docs: nommer les deux lectures, et dire laquelle est une primitive

.project/VOCABULARY.md

@@ -6,6 +6,8 @@
   «app-contract»
    `reference`       a NURI that names a document and grants nothing — what an application circulates                                  (never: link, lien, share-link · see: contract_polyfill-surface)
    `ReadCap`         upstream's word for what opens a document — a reference carrying its secret                                       (never: token, credential, permission)
+   `shape read`      a read whose selector is a ShEx shape, i.e. which predicates an object carries, never a list of documents         (never: typed read, shape-based read, lecture par forme · see: knowledge_what-a-read-scope-is-upstream)
+   `document read`   a read selected by naming documents - upstream anchors ONE, so naming several is this package's own composition   (never: bulk read, union read, lecture par document)
    `polyfill-era`    a published symbol with no counterpart in the target SDK, deleted at migration                                    (never: transitional, shim-only · see: knowledge_what-an-app-deletes-at-migration)
 
   «e2e-harness»

.project/concepts/app-contract/_overview.md

@@ -19,6 +19,13 @@ vocabulary:
   - term: ReadCap
     gloss: upstream's word for what opens a document — a reference carrying its secret
     not: [token, credential, permission]
+  - term: shape read
+    gloss: a read whose selector is a ShEx shape, i.e. which predicates an object carries, never a list of documents
+    not: [typed read, shape-based read, lecture par forme]
+    see: knowledge_what-a-read-scope-is-upstream
+  - term: document read
+    gloss: a read selected by naming documents - upstream anchors ONE, so naming several is this package's own composition
+    not: [bulk read, union read, lecture par document]
   - term: polyfill-era
     gloss: a published symbol with no counterpart in the target SDK, deleted at migration
     not: [transitional, shim-only]