[AZ-842] Batch 04 cycle 4: AZ-835 docs + cycle-4 redesign narrative

Closes AZ-835 Epic C6 (docs) and folds the cycle-4 replay-input
redesign narrative (AZ-894 CSV adapter / AZ-895 auto-sync deprecation
/ AZ-896 format spec / AZ-897 UI follow-up) into the three
authoritative documents.

Modified:
- _docs/02_document/contracts/replay/replay_protocol.md: extend
  Invariant 12 with sub-invariants 12.c (route-driven supersedes
  bbox; ~100x tile efficiency + did-fly-vs-might-fly honesty) and
  12.d (fixture failure-handling: validation/terminal re-raise;
  transient -> C11 backoff x3). Add Invariant 14 with sub-
  invariants 14.a-14.d covering the single canonical clock model,
  the CSV-driven path, the tlog adapter's audit-only role, the
  auto-sync deprecation, and the AZ-897 UI follow-up pointer.
- _docs/02_document/architecture.md: add the AZ-777 Phase 3+
  superseded-by-Epic-AZ-835 supersession block + new "Replay input
  redesign (cycle 4)" sub-section with the cycle-4 ticket table.
- tests/e2e/replay/README.md: top section restructured for two
  distinct entry points (AZ-265/AZ-404 vs. AZ-835/AZ-840); add
  full AZ-835 orchestrator-test section (env vars, skip gates,
  expected runtime, verdict report path); add Imagery (c) Google
  attribution + dev-only caveat; add Epic AZ-835 ticket map.

Spec deviation: AC-1b says "new Invariant 13" but Invariant 13 is
already taken (C4<->C5 pairing, AZ-776 / ADR-012), and is referenced
by number in architecture.md, c4_pose description.md, and ADR-012
prose. Cycle-4 content shipped as Invariant 14 to preserve those
cross-references; renumbering would have cascaded to 3 files outside
AZ-842's ownership envelope. Documented in batch report.

Out-of-scope hygiene gap (NOT fixed in this batch):
BUILD_CSV_REPLAY_ADAPTER flag is not yet enumerated in
_docs/02_document/module-layout.md's Build-Time Exclusion Map.
Inherited from cycle-4 AZ-894. Suggested as a cycle-5+ hygiene PBI.

AZ-835 epic file stays in todo/ until AZ-841 (backlog) is resolved.

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

_docs/_autodev_state.md

@@ -6,9 +6,9 @@ step: 10
 name: Implement
 status: in_progress
 sub_step:
-  phase: 0
-  name: awaiting-invocation
-  detail: ""
+  phase: 7
+  name: batch-loop
+  detail: "batch 4 closed (AZ-842); next: AZ-897 or AZ-943"
 retry_count: 0
 cycle: 4
 tracker: jira