[autodev] Step 13 partial: c1/c2/c2_5/c3 cycle-1 doc sync

Item 2 (C1) + item 3 batch 1 of ~5 (C2 VPR, C2.5 Rerank, C3 Matcher)
of the cycle-1 component-description reconciliation called out in
ripple_log_cycle1.md.

For each touched description.md:
- Add a "Cycle-1 operational reality" paragraph in section 1 that
  names the _STRATEGY_REGISTRY + register_airborne_strategies()
  runtime gate (AZ-591), the pre_constructed dict path through
  compose_root (AZ-618 umbrella), the per-component
  AIRBORNE_REQUIRED_PRE_CONSTRUCTED_KEYS row, and any cycle-1
  strategy-default vs documented-primary disambiguation
  (net_vlad as the C2 default; xfeat parked from the C3 airborne
  registry).
- Relax the OpenCV row in section 5 Key Dependencies to the
  D-CROSS-CVE-1 cycle-1 pin (>=4.11.0.86,<4.12) wherever the
  component imports cv2 (C2 preprocessors, C2.5 ORB placeholder,
  C3 RANSAC + reprojection).
- Add a "Cycle-1 Tier-2 follow-up dependencies" subsection in
  section 7 only for components with a strategy module that is
  built but parked from the airborne registry (C3 xfeat).

Refresh ripple_log_cycle1.md follow-up ordering with per-batch
progress + extracted batch pattern so the next batch session has
a self-contained recipe. Bump _autodev_state.md sub_step.detail
to reflect batch 1 completion (10 components + 8 helpers + tests/
remain).

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

_docs/_autodev_state.md

@@ -8,7 +8,7 @@ status: in_progress
 sub_step:
   phase: 6
   name: component-doc-updates
-  detail: "item-1 done (architecture.md + module-layout.md; system-flows.md no-op); items 2-4 deferred (C1 description, 13 components, 8 helpers, tests/)"
+  detail: "items 1-2 done; item 3 batch 1/~5 done (c2/c2_5/c3); 10 components + 8 helpers + tests/ remain"
 retry_count: 0
 cycle: 1
 tracker: jira