P14-03: Versioned shaft-wait saves, keep riders aboard, real-actor proof

- ElevatorService snapshot v2 carries the shaft-wide wait; v1 saves (written
  with every elevator dynamic_cost 0) migrate by deriving it on load, and any
  v2 mismatch, including all zeros, is rejected atomically. A genuine save
  from 50ceca0 is kept as tests/fixtures/p14-03/legacy_rush_v1.
- A guest aboard a cabin no longer decides, leaves or despawns until the
  elevator sets it down at a real landing; previously a rider told to leave
  vanished from a moving cabin.
- test_route_wait_choice now proves the rush detour and route loss with a
  worker who actually walks, every shared rider's arrival cell, service
  elevator and stair congestion, legacy migration and a new-PID restart.
- Register completion markers for the seven suites added this session and
  bring the P14 ledger in line with P14-02's completion.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/plans/original-completion-2026-10-02/plan_validation.json

@@ -243,7 +243,7 @@
     "facility_value_contracts_validation.json": "bf490a9ca585c48fc318e76c4a069ef244827d828d46e6415399f7710590dd16",
     "performance_audit.json": "0b630b15a392c3e0366f1362bfe4ddacb968f915f54549f82e4d6fa315384762",
     "progress_contract.json": "ccbdfce8c8365d5c13f59531955708834cce45acd0e136561c95295dfdb5df77",
-    "progress_snapshot.json": "2b3fc779aa0a9e182d4e45571f415c7e48bee0c7c2229e21a771c73a9ec52835",
+    "progress_snapshot.json": "faae14c8b560bcdf681cf17055797aea38207d25a9e2a3b77aef0d81cc49d983",
     "progress_validator_guard_checks.json": "72ee513fcf1cad85c24bfd0a4b472f425f6acf117928ece0f6b41e29018da627",
     "progress_validator_guard_checks.r01.json": "14c26adffa5a1938241db4912e50ea54b660641ee6fee2e412d467dce14d0519",
     "requirement_coverage.json": "03b10e4da367579db502d0671a6e0dda36fd385111c6f1c0084acaff7605f593",
@@ -253,6 +253,6 @@
     "validate_facility_value_contracts.py": "91640e2a76cd6cc9186f7b85c0bf379b24b6cac0d48962815235ee628e7ae43e",
     "validate_plan.py": "4973d3c2797289d266f5c6e7c36f3d2c31931b23a1022eab3d94328267bcc1b4",
     "validator_update_checks.json": "f997d0f3de2cea29550840b1d5cb23647d64f81329de46758551e2b6c8fecc27",
-    "work_packages.json": "a9964db9d8e73b2fe8e4d524668bfc8a6c7a50ac81cc7000f172ea743faef0a3"
+    "work_packages.json": "5b5481c60b40f20bef4eb1886f97d8ba9b6adbf879c3562a4207c08ae3bf75a6"
   }
 }