Prevent saved CHOAM movement arrival deadlocks

Preflight ordinary movement through the existing arrival quote before creating new Ornithopter escrow or opening Ixian, Fremen and CHOAM prevention windows. An explicit legacy CHOAM decline can return an uncommitted unsupported arrival for another choice without consuming movement or touching forces, spice, cards or tokens. Preserve an existing Ornithopter and retire it exactly once on a legal replacement move. Keep dedicated Ambassador relocation handling and Karama cancellation validation before cost; unrelated exceptions remain atomic. Simultaneous Ambassador/Terror priority still awaits the recorded material interpretation, with no invented ordering.

Add reusable offline faction-game samples with genuine Basic/Advanced setup, all four AI profiles, physical custody checks, JSON restorations, private traces and failed snapshots. Source-bound reports and input snapshot hashes make fresh and resumed samples repeatable; document that a resumed continuation starts a new seeded stream and does not prove input setup provenance.

Validation: independently reviewed fresh declaration, native cancellation, supported single arrivals, legacy retry and card custody tests. Two production SQLite tests cover authenticated private restoration, stale/duplicate/wrong-owner rejection, resource conservation and concurrent version races. Typecheck, lint, 4583 offline tests, production build and 43 HTTP tests passed. Retain the initial failed check log for the corrected numeric-sort lint issue.

All six fresh samples complete. CHOAM Basic 1054 actions/28 JSON restores, CHOAM Advanced 225/6, Ecaz Basic 91/2, Ecaz Advanced 523/14, all-three Basic 476/12, all-three Advanced 1303/35 with a turn-six CHOAM win. Combined Advanced has 46 guarded arrival candidates with legal alternatives. The exact prior 614-action failed snapshot separately finishes after 691 additional actions/18 restores and 39 guarded candidates. These are bounded paths, not complete faction or combination certification. Gameplay source hashes match the final checkpoint; later evidence-only documentation and recovery-test lint edits are explicit.

After the reported outage, all 632 opening games and original seat/recovery records were preserved (665 after HTTP tests); integrity and foreign keys passed. Existing Ecaz and Ixian browser seats restored their same private hands, resources and pending choices after reload. This is browser restoration evidence, not a staged arrival-return claim. The healthy server was reused; no restart, database reset, recurring automation or publication.

Verified source tree: 550221850f4802c41155f7bbc35d623965bc7db3330825636d50f26bb42868f8

docs/VERIFICATION_WORKFLOW.md

@@ -28,6 +28,34 @@ An interrupted or incomplete report is never evidence of success.
 
 ## Saved games and online backups
 
+### Reusable faction sample games
+
+```sh
+node --import tsx tools/faction-games.ts --out /tmp/dune-new-faction-games
+node --import tsx tools/faction-games.ts --out /tmp/dune-new-combined --profile combined --rules advanced --seed 20260926
+node --import tsx tools/faction-games.ts --out /tmp/dune-new-resume --resume /private/failed-combined-advanced.json
+```
+
+This offline tool runs six fixed CHOAM/Richese, Ecaz/Moritani and combined
+Basic/Advanced samples from genuine setup, using all four AI profiles. Filters
+retain each scenario's seed offset. `--seed` defaults to 20260926;
+`--max-actions` defaults to 3500 accepted actions per game. Every action checks
+physical card and force custody; every 37 actions checks all private views after
+JSON restoration. Rejected candidates remain visible in private traces even when
+a later candidate succeeds. Samples are development evidence, not calibration or
+complete rules certification.
+
+The output is a new private directory outside the checkout. It contains private
+traces, incomplete-game snapshots, `results.json` and a source-bound `report.json`.
+An incomplete game or changed source exits nonzero. Resume requires a matching
+fixed-scenario snapshot with saved AI profiles and records its SHA-256; it cannot
+be combined with profile/rules filters. Its action budget starts at the snapshot,
+and its random stream restarts from the supplied seed plus scenario offset.
+Check setup provenance against the original report: accepting a supplied snapshot
+does not prove it came from genuine setup. No live room or database is accessed.
+
+### Preservation commands
+
 ```sh
 node --import tsx tools/saved-games.ts snapshot --db /absolute/games.sqlite --out /private/new-baseline --backup
 node --import tsx tools/saved-games.ts compare --db /absolute/games.sqlite --baseline /private/new-baseline/snapshot.json