feat: true-microservices #40

- Add `postMoveStatus` batch method to `RuleSet` trait (default impl composes
  individual calls; `RuleSetRestAdapter` overrides with single HTTP round-trip)
- Collapse 5 sequential rule checks in `GameEngine.executeMove` into one
  `postMoveStatus` call
- Add `POST /api/rules/post-move-status` endpoint to rule-service
- Add `exportCombined` to `IoServiceClient` and `POST /io/export/combined`
  endpoint to io-service, replacing two separate FEN/PGN HTTP calls
- Fix `statusOf` to pattern-match on `WinReason` from `ctx.result` instead
  of making a redundant `isCheckmate` HTTP call
- Remove duplicate `legalMoves` pre-validation in `GameResource.makeMove`;
  engine already validates and fires `InvalidMoveEvent`
- Add `scalafix:off` guards for pre-existing `var`/`return` usage in
  `DefaultRules` hot-path code
- Apply spotless formatting to previously unformatted files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

feat(grpc): implement gRPC services for game context management and move handling b6be0cd249

feat(account): enhance account management with user and bot account functionalities ec09a1bdb9

feat(redis): implement Redis integration for game state management and websocket communication 83f84371be

feat(coordinator): scaffold microservice for <300ms failover and load balancing f327441089

- Add coordinator module with gRPC stream-based instance health detection
- Implement InstanceHeartbeatService in core: bidirectional stream to coordinator every 200ms
- Track game subscriptions per core via Redis Sets (SADD/SREM)
- Add gRPC handlers for batch resubscribe/unsubscribe/evict/drain operations
- Implement coordinator services: InstanceRegistry, FailoverService, LoadBalancer, AutoScaler, CacheEvictionManager
- Add REST API for metrics and manual failover/rebalance/scaling
- Proto definition: coordinator_service.proto with HeartbeatStream + batch game operations
- Failover timeline: gRPC stream drop (50-200ms) → game migration (<300ms target)
- Support for Argo Rollouts auto-scaling (k8s CRD patching via Fabric8 client)

Note: Proto compilation issues documented in COORDINATOR_IMPLEMENTATION.md. Requires:
- Add task dependency: tasks.compileScala dependsOn tasks.compileJava
- Fix deprecated @Inject var = _ → = uninitialized syntax
- Implement remaining service methods (gRPC clients, FailoverService distribution)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

feat(coordinator): add Redis integration and improve configuration for game state management

Build & Test (NowChessSystems) TeamCity build was removed from queue

Details

106b4d3b7e

feat(auto-scaling): enhance AutoScaler with atomic lastScaleTime and improve scaling logic 57e6e5d200

feat(coordinator): enhance instance management with game migration count and configurable ports 64d5afa4d1

feat(coordinator): add configurable coordinator settings and enhance WebSocket connection handling

Build & Test (NowChessSystems) TeamCity build failed

Details

6b59e68e04

feat(bot): implement bot architecture with difficulty levels and game context handling c10a4d7e64

feat(security): add internal secret handling and Redis integration for bot events 1ab6532b0a