[CLAUDE] Docs: S44 monthly drift audit + AI_INFRA bundle 06-01 adopt

Cadence audit (2026-06-01), docs-only -> CI-skip. investigator-codebase
drift scan (ground-truth from disk) -> em main patch. No code touched,
154 test unchanged.

Drift fixes (42 count corrections): 40->42 mig, 84/59/55/47->91 tables,
130/111->154 test, 52/49->56 gotcha across CLAUDE.md, docs/CLAUDE.md,
ef-core-migration + dependency-audit skills, schema-diagram, database-guide.
schema-diagram migration table extended Mig 17-42; ef-core history Mig 27-42;
detailed-section gap (Mig 27-42 modules) flagged explicit (deferred, not silent).

AI_INFRA bundle 06-01 (federated, full scope):
- A: RAG T1/T2 auto-ack
- C: hygiene 7/7 agent-mem L1 <=16KB; "25KB"->"~30KB tiered" wording x7
- D: #4 self-sustaining adoption-report step -> /session-end Phase 6.3
- E/F: report + ledger -> docs/governance/

Carry-over .mcp.json + BROADCAST-05-29 left untouched (concurrency rule).

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

.claude/agent-memory/implementer-backend/MEMORY.md

@@ -1,6 +1,6 @@
 # Implementer-Backend Agent — Persistent Memory
 
-> **Persistent diary cross-session.** Auto-injected first 200 lines / 25KB at spawn.
+> **Persistent diary cross-session.** Auto-injected first ~200 lines at spawn (L1 HOT).
 > Update BEFORE every stop. Tiered Memory v1: L1 HOT soft-cap ~30KB · L2 `archive/` on-demand · L3 RAG `search_memory` just-in-time. Keep entry ≤ 1.5K chars (gotcha #53).
 > Full verbatim history pre-S40 → git `d2f52ba` + `archive/2026-05-q1..q4.md`.
 > **Renamed S39:** implementer → implementer-backend (.NET half). FE patterns → `implementer-frontend` MEMORY. Test patterns → `test-specialist` MEMORY.
@@ -86,5 +86,5 @@ UI `disabled={!canX}` + BE helper `EnsureCanXAsync(id, userId)` throw 403 (NOT i
 ---
 
 ## 🔄 Curate trigger
-- >25KB → archive recent → `archive/<period>.md`. Stale >3mo → remove.
+- >~30KB → archive recent → L2 `archive/<period>.md`. Stale >3mo → remove.
 - **Last curate: 2026-05-29 S40 em main proxy** (30.9→~18KB): **dedup split** — removed FE patterns (5/6/13/14/15/16-bis → implementer-frontend) + test patterns (10/11/12 → test-specialist), condensed Pattern 12-bis/12-ter, refreshed stale (104/111→130 test, Opus 4.7→4.8 model). BE patterns 1-4/7-9/12-bis/12-ter foundation preserved. Prev: S34 q3 · S32 q2 · S22 q1.