[AZ-696] chore: cycle-2 bootstrap — gitignore tlog inputs, Step 9 PBIs

Pre-implement chore commit to land orchestration artifacts produced by
autodev cycle-2 Step 9 (New Task), so that Step 10 (Implement) starts
against a clean working tree.

What's included:

- .gitignore: exclude _docs/00_problem/input_data/**/*.{tlog,mp4,h264}
  (derkachi.tlog is a 5.8 MB binary input and stays out-of-band).
- _docs/02_tasks/todo/AZ-697..AZ-702: 6 new PBI specs under epic AZ-696
  (tlog ground-truth extractor, mid-flight trim+align, real-flight
  validation runner, replay map viz, HTTP replay API, KHP20S30 calib).
- _docs/02_tasks/_dependencies_table.md: dep edges for the 6 PBIs.
- _docs/_autodev_state.md: status -> in_progress, step 10 cycle 2.
- _docs/_process_leftovers/...opencv_pin_deferred.md: replay-attempt
  timestamp refreshed (gtsam-numpy-2 wheels still not published;
  leftover remains open).

No source code is modified by this commit.

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

_docs/_autodev_state.md

@@ -2,13 +2,13 @@
 
 ## Current Step
 flow: existing-code
-step: 9
-name: New Task
-status: not_started
+step: 10
+name: Implement
+status: in_progress
 sub_step:
   phase: 0
   name: awaiting-invocation
-  detail: ""
+  detail: "epic AZ-696 — 6 PBIs AZ-697..AZ-702 in todo/; impl order: T1+T6 → T2 → T3 → T4 → T5"
 retry_count: 0
 cycle: 2
 tracker: jira