feat: NCS-82 add Swiss-system tournament module (#55)

## Summary

  - Implements the full tournament lifecycle (create, join, withdraw, start,
    round progression, finish) as a standalone Quarkus module
  - All 11 endpoints from the OpenAPI spec (`docs/tournament-openapi.yaml`) are covered
  - Swiss pairing algorithm with Buchholz tiebreak and bye support
  - Per-bot NDJSON event stream with targeted `gameStart` events carrying
    the correct `color` field
  - Game results ingested via Redis writeback stream (`GameResultStreamListener`)

  ## Known gaps (deferred)

  - `GET /results` `nb` param defaults to 100 instead of all
  - `PairingDto` exposes an internal `id` field not in the spec
  - `GameExport.moves` emits PGN instead of UCI (upstream `GameWritebackEventDto`
    does not carry UCI moves)
  - `Pairing.white` can be `null` for bye rounds (spec has no bye concept)

  ## Test plan

  - [x] 23 `TournamentResourceTest` integration tests (H2, mocked core client) — all pass
  - [x] 5 `SwissPairingServiceTest` unit tests — all pass
  - [x] Redis listener excluded in test/dev profiles; no Docker required to run tests

---------

Co-authored-by: LQ63 <lkhermann@web.de>
Co-authored-by: Lala, Shahd <Shahd.Lala@sybit.de>
Reviewed-on: #55

.gitignore

@@ -49,3 +49,8 @@ graphify-out/
 /jacoco-reporter/.venv/
 /.claude/settings.local.json
 /.claude/worktrees/
+modules/tournament/src/main/resources/keys/dev-public.pem
+modules/account/src/main/resources/keys/dev-private.pem
+modules/account/src/main/resources/keys/dev-public.pem
+modules/core/src/main/resources/keys/dev-public.pem
+*.hprof