Adds a @data scenario (workshop/read-filter) that enables the lib's read filter on the
real reactive ORM set (via a FilterProbe + setupReadFilter harness helper, granting each
participation to its own user) and asserts useShape returns only the target user's
participations. Validates the trickiest piece — filtering a live DeepSignalSet — against the
broker. @data 9/9. Doc: read filter marked implemented & validated.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Sylvain Duchesne
aec338441c