Add the ability to sync specific issues or merge requests by IID without
running a full incremental sync. This enables fast, targeted data refresh
for individual entities — useful for agent workflows, debugging, and
real-time investigation of specific issues or MRs.
Architecture:
- New CLI flags: --issue <IID> and --mr <IID> (repeatable, up to 100 total)
scoped to a single project via -p/--project
- Preflight phase validates all IIDs exist on GitLab before any DB writes,
with TOCTOU-aware soft verification at ingest time
- 6-stage pipeline: preflight -> fetch -> ingest -> dependents -> docs -> embed
- Each stage is cancellation-aware via ShutdownSignal
- Dedicated SyncRunRecorder extensions track surgical-specific counters
(issues_fetched, mrs_ingested, docs_regenerated, etc.)
New modules:
- src/ingestion/surgical.rs: Core surgical fetch/ingest/dependent logic
with preflight_fetch(), ingest_issue_by_iid(), ingest_mr_by_iid(),
and fetch_dependents_for_{issue,mr}()
- src/cli/commands/sync_surgical.rs: Full CLI orchestrator with progress
spinners, human/robot output, and cancellation handling
- src/embedding/pipeline.rs: embed_documents_by_ids() for scoped embedding
- src/documents/regenerator.rs: regenerate_dirty_documents_for_sources()
for scoped document regeneration
Database changes:
- Migration 027: Extends sync_runs with mode, phase, surgical_iids_json,
per-entity counters, and cancelled_at column
- New indexes: idx_sync_runs_mode_started, idx_sync_runs_status_phase_started
GitLab client:
- get_issue_by_iid() and get_mr_by_iid() single-entity fetch methods
Error handling:
- New SurgicalPreflightFailed error variant with entity_type, iid, project,
and reason fields. Shares exit code 6 with GitLabNotFound.
Includes comprehensive test coverage:
- 645 lines of surgical ingestion tests (wiremock-based)
- 184 lines of scoped embedding tests
- 85 lines of scoped regeneration tests
- 113 lines of GitLab client single-entity tests
- 236 lines of sync_run surgical column/counter tests
- Unit tests for SyncOptions, error codes, and CLI validation
