refactor: complete maintainability phases 1-9 and fix all tests
Test fixes (all 41 test packages now pass):
- Fix ComputeTaskProvenance - add dataset_specs JSON output
- Fix EnforceTaskProvenance - populate all metadata fields in best-effort mode
- Fix PrewarmNextOnce - preserve prewarm state when queue empty
- Fix RunManifest directory creation in SetupJobDirectories
- Add ManifestWriter to test worker (simpleManifestWriter)
- Fix worker ID mismatch (use cfg.WorkerID)
- Fix WebSocket binary protocol responses
- Implement all WebSocket handlers: QueueJob, QueueJobWithSnapshot, StatusRequest,
CancelJob, Prune, ValidateRequest (with run manifest validation), LogMetric,
GetExperiment, DatasetList/Register/Info/Search
Maintainability phases completed:
- Phases 1-6: Domain types, error system, config boundaries, worker/API/queue splits
- Phase 7: TUI cleanup - reorganize model package (jobs.go, messages.go, styles.go, keys.go)
- Phase 8: MLServer unification - consolidate worker + TUI into internal/network/mlserver.go
- Phase 9: CI enforcement - add scripts/ci-checks.sh with 5 checks:
* No internal/ -> cmd/ imports
* domain/ has zero internal imports
* File size limit (500 lines, rigid)
* No circular imports
* Package naming conventions
Documentation:
- Add docs/src/file-naming-conventions.md
- Add make ci-checks target
Lines changed: +756/-36 (WebSocket fixes), +518/-320 (TUI), +263/-20 (Phase 8-9)
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