Update autodev state and lessons documentation

- Changed current step from 16 (Deploy) to 9 (New Task) and updated cycle from 1 to 2 in _docs/_autodev_state.md.
- Closed Cycle 1 (Phase B) and noted that Steps 14, 15, and 16 were skipped due to no changes in auth, wire, or performance surfaces.
- Added new lessons to _docs/LESSONS.md, including insights on architecture gates and handling state discrepancies during session resumes, sourced from recent retrospectives.

Co-authored-by: Cursor <cursoragent@cursor.com>

_docs/_autodev_state.md

@@ -2,28 +2,19 @@
 
 ## Current Step
 flow: existing-code
-step: 16
-name: Deploy
+step: 9
+name: New Task
 status: not_started
 sub_step:
   phase: 0
   name: awaiting-invocation
   detail: ""
 retry_count: 0
-cycle: 1
+cycle: 2
 tracker: jira
 
 ## Notes
-- Cycle 1 (Phase B) refactor cycle: F4 (AZ-485, `23746ec`) and F7
-  (AZ-486, `8a461a2`) closed.
-- Step 13 (Update Docs) DONE in working tree, NOT YET COMMITTED. User
-  skipped the commit gate; 12 module docs + new `src__api__endpoints.md`
-  + `01_api-transport/description.md` + ripple log + 2 cycle reports
-  pending review. Commit subject for when ready:
-  `[AZ-485] [AZ-486] Cycle 1 docs refresh (Step 13)`.
-- Step 14 (Security Audit) SKIPPED — cycle 1 was structural refactor
-  only; URL strings character-identical to pre-refactor (pinned by
-  `endpoints.test.ts`), no new auth / wire / permission surface.
-- Step 15 (Performance Test) SKIPPED — same rationale; no
-  latency-/throughput-relevant code paths changed.
-- Next: Step 16 (Deploy) — destructive; awaiting user decision.
+- Cycle 1 (Phase B) CLOSED. Retro: `_docs/06_metrics/retro_2026-05-12.md`
+  (+ `structure_2026-05-12.md`). Lessons appended to `_docs/LESSONS.md`.
+  Steps 14, 15, 16 SKIPPED (character-identical structural refactor); no
+  auth/wire/perf/deploy-relevant surface changed.