1976d8ad2b
Adds two test files to prove B4/B3 invariants end-to-end: - RepoKnowledgeReplayTest (testing/replay): projection-based replay tests that verify recorded RepoKnowledgeRetrievedEvent drives relevantFiles context assembly without consulting a retriever (test A), and that a log without the retrieval event falls back to the RepoMapComputedEvent legacy path (test B). - RepoMapReuseIntegrationTest (testing/integration): end-to-end test using the real ProjectMemoryService + L3RepoKnowledgeRetriever + InMemoryL3MemoryStore proving exactly one index walk across two sessions sharing the same stateKey, and that the second session receives non-empty repo hits via the shared L3 embeddings despite having no per-session RepoMapComputedEvent. New test deps (noted per constraint): - testing/replay: adds core:context (needed to import ContextLayer/ContextEntry from the buildRelevantFilesEntry return type). - testing/integration: adds apps:server (ProjectMemoryService, L3RepoKnowledgeRetriever, FakeWorkspaceStateProbe), core:router (InMemoryL3MemoryStore), core:config (ProjectConfig). No new inter-core or upward production dependencies introduced.