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.
kami