chore(client): retirer la migration legacy + alléger les logs d'accès

- Migration des comptes legacy supprimée (migrateLegacyRecords + garde migratedInto
  + call-sites). Un wallet pré-fix (records store-root, pas de pointeur) provisionne
  simplement un doc-shim frais; contenu legacy ignoré (voulu, données = dev). La
  résolution barrière-autoritative + anti-fork (resolvePointer/ensureRepoOpen/
  canonicalDoc/ensureInFlight/pointerGuard) est inchangée.
- Logs d'accès SDK préfixés [polyfill] + NURI tronqué via shortNuri() (retire
  did:ng:o: et :v:…, garde 8 chars) → moins verbeux.
  Ex: [polyfill] [user1] READ vDlwbZio… (resolvePointer) → 1 triple-rows

Tests: bun test unit 126/0. Docs (nextgraph-current-state/simulation/migration-guide)
mis à jour (migration legacy retirée du modèle décrit).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/client/test/anti-fork.test.ts

@@ -1,7 +1,7 @@
 /**
  * anti-fork.test.ts — behavioral tests for the reconnection fix in the
  * polyfill-era shim (src/store-registry.ts), redesigned around the
- * pointer → doc-shim indirection. Three groups, one file:
+ * pointer → doc-shim indirection. Two groups, one file:
  *
  *  (1) DETERMINISTIC RESOLUTION — a doc-shim whose account subject carries
  *      DUPLICATE scope-doc values (fork residue: several `shim:docPublic`) must
@@ -17,11 +17,6 @@
  *      authoritative, so a genuinely-present account is found on the first read
  *      and never re-provisioned (no fork). This replaced the deleted
  *      `resolveAccountReliably` / `provisionRetry` account retry.
- *
- *  (3) MIGRATION — a wallet whose accounts were written at the OLD location (the
- *      store-root graph, pre-indirection) must have those records MIGRATED into
- *      the doc-shim at resolution, so a legacy account resolves (is READ, not
- *      re-provisioned) after reconnect. No existing account is lost.
  */
 
 import { describe, it, expect, mock, beforeEach, afterAll } from "bun:test";
@@ -56,8 +51,7 @@ const ROOT = "did:ng:PRIV-AF";
 //   - The POINTER (`<shim:root> <shim:shimDoc> <docShim>`) lives in the store-root
 //     graph (keyed by GRAPH <ROOT>).
 //   - AccountRecords live in the doc-shim (anchored default graph, keyed by the
-//     anchor arg = the doc-shim NURI). A LEGACY record may ALSO be seeded directly
-//     in the store-root graph (the pre-indirection location) to exercise migration.
+//     anchor arg = the doc-shim NURI).
 //   - doc_subscribe pushes an initial `State` so ensureRepoOpen resolves at once
 //     (the barrier).
 // ---------------------------------------------------------------------------
@@ -107,9 +101,9 @@ function makeSparqlUpdate(quads: Quad[]) {
   });
 }
 
-/** Build the account-SELECT bindings from the quads in ONE graph (the doc-shim, or
- *  the store-root for the migration read), grouped per subject. A subject with
- *  DUPLICATE scope docs yields a cross-product of bindings — a corrupted shim. */
+/** Build the account-SELECT bindings from the quads in ONE graph (the doc-shim),
+ *  grouped per subject. A subject with DUPLICATE scope docs yields a cross-product
+ *  of bindings — a corrupted shim. */
 function accountBindings(quads: Quad[], anchor: string | undefined, onlySubject: string | null) {
   const bySubject = new Map<string, { id: string; pub: string[]; prot: string[]; priv: string[] }>();
   for (const q of quads) {
@@ -147,9 +141,8 @@ function makeFakeNg() {
   const quads: Quad[] = [];
   let docCounter = 0;
   // Count account SELECTs per anchor graph. The AUTHORITATIVE account read is anchored
-  // to the doc-shim (a did:ng:o: NURI); the one-time legacy MIGRATION scan is anchored
-  // to the store-root (ROOT). Counting per-anchor lets a test assert "exactly one
-  // doc-shim account read" (no account RETRY) separately from the migration scan.
+  // to the doc-shim (a did:ng:o: NURI). Counting per-anchor lets a test assert "exactly
+  // one doc-shim account read" (no account RETRY).
   const accountReadsByAnchor = new Map<string, number>();
   const doc_create = mock(async (..._a: unknown[]) => `did:ng:o:doc${++docCounter}`);
   const sparql_update = makeSparqlUpdate(quads);
@@ -163,8 +156,7 @@ function makeFakeNg() {
         .map((q) => ({ shimDoc: { value: q.o } }));
       return { results: { bindings } };
     }
-    // Account SELECT — anchored either to the doc-shim (authoritative read) or, for
-    // the migration scan, to the store-root (legacy location). Same shape either way.
+    // Account SELECT — anchored to the doc-shim (the authoritative read).
     if (query.includes("<urn:ng-eventually:shim:id>")) {
       accountReadsByAnchor.set(anchor ?? "", (accountReadsByAnchor.get(anchor ?? "") ?? 0) + 1);
       const subjM = query.match(/<([^>]+)>\s+a\s+<urn:ng-eventually:shim:Account>/);
@@ -185,7 +177,7 @@ function makeFakeNg() {
     _quads: quads,
     // Total account reads across all anchors.
     getAccountQueryCount: () => [...accountReadsByAnchor.values()].reduce((a, b) => a + b, 0),
-    // Account reads anchored to a did:ng:o: doc-shim (excludes the store-root migration scan).
+    // Account reads anchored to a did:ng:o: doc-shim.
     getDocShimAccountReads: () =>
       [...accountReadsByAnchor.entries()]
         .filter(([g]) => g.startsWith("did:ng:o:"))
@@ -292,8 +284,7 @@ describe("reconnect resolves the SAME account through the doc-shim barrier (no f
     expect(resolved.docProtected).toBe(orig.docProtected);
     expect(resolved.docPrivate).toBe(orig.docPrivate);
     expect(reconnect.doc_create).toHaveBeenCalledTimes(0); // no new docs → no fork
-    // Barrier-authoritative: found on the FIRST doc-shim read (the store-root migration
-    // scan, which finds nothing to migrate here, is separate).
+    // Barrier-authoritative: found on the FIRST doc-shim read.
     expect(reconnect.getDocShimAccountReads()).toBe(1);
   });
 
@@ -336,62 +327,3 @@ describe("reconnect resolves the SAME account through the doc-shim barrier (no f
   });
 });
 
-// ---------------------------------------------------------------------------
-// (3) Migration — legacy store-root records folded into the doc-shim
-// ---------------------------------------------------------------------------
-
-describe("migration: legacy store-root records are read (not re-provisioned) after reconnect", () => {
-  beforeEach(() => { resetRegistryCache(); resetOpenedRepos(); });
-
-  it("(3a) a pre-indirection account (records in the store-root, no pointer) is migrated into a new doc-shim and resolves — no fork", async () => {
-    const fakeNg = makeFakeNg();
-    inject(fakeNg);
-    // Seed a LEGACY account directly in the store-root graph (old location), NO pointer.
-    const subj = "urn:ng-eventually:shim:account:legacyuser";
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:id", o: "legacyuser" });
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:docPublic", o: "did:ng:o:legacy-pub" });
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:docProtected", o: "did:ng:o:legacy-prot" });
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:docPrivate", o: "did:ng:o:legacy-priv" });
-
-    const rec = await ensureAccount("legacyuser");
-
-    // The legacy account was READ (migrated), NOT re-provisioned: original NURIs come
-    // back, and NO scope docs were created (only the fresh doc-shim: 1 doc_create).
-    expect(rec.docPublic).toBe("did:ng:o:legacy-pub");
-    expect(rec.docProtected).toBe("did:ng:o:legacy-prot");
-    expect(rec.docPrivate).toBe("did:ng:o:legacy-priv");
-    expect(fakeNg.doc_create).toHaveBeenCalledTimes(1); // only the new doc-shim
-
-    // A pointer was written, and the record now also lives in the doc-shim.
-    const pointerRow = fakeNg._quads.find(
-      (q) => q.g === ROOT && q.p === "urn:ng-eventually:shim:shimDoc",
-    );
-    expect(pointerRow?.o).toMatch(/^did:ng:o:doc/);
-    const inDocShim = fakeNg._quads.some(
-      (q) => q.g === pointerRow!.o && q.p === "urn:ng-eventually:shim:docPublic" && q.o === "did:ng:o:legacy-pub",
-    );
-    expect(inDocShim).toBe(true);
-  });
-
-  it("(3b) a pointer that predates migration still folds legacy store-root records into its doc-shim", async () => {
-    const fakeNg = makeFakeNg();
-    inject(fakeNg);
-    // A doc-shim + pointer already exist (empty doc-shim), records still only in the root.
-    const docShim = "did:ng:o:existing-shim";
-    fakeNg._quads.push({ g: ROOT, s: "urn:ng-eventually:shim:root", p: "urn:ng-eventually:shim:shimDoc", o: docShim });
-    const subj = "urn:ng-eventually:shim:account:oldtimer";
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:id", o: "oldtimer" });
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:docPublic", o: "did:ng:o:old-pub" });
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:docProtected", o: "did:ng:o:old-prot" });
-    fakeNg._quads.push({ g: ROOT, s: subj, p: "urn:ng-eventually:shim:docPrivate", o: "did:ng:o:old-priv" });
-
-    const rec = await ensureAccount("oldtimer");
-
-    expect(rec.docPublic).toBe("did:ng:o:old-pub");
-    expect(fakeNg.doc_create).toHaveBeenCalledTimes(0); // doc-shim already existed
-    const inDocShim = fakeNg._quads.some(
-      (q) => q.g === docShim && q.p === "urn:ng-eventually:shim:docPublic" && q.o === "did:ng:o:old-pub",
-    );
-    expect(inDocShim).toBe(true);
-  });
-});