fix(MULTIVERSION-0001): fix multi-version indexing — jobs never created or triggered for secondary versions

Two bugs prevented secondary versions from ever being indexed:

1. JobQueue.enqueue() and RepositoryService.createIndexingJob() deduplication
   only checked repository_id, so a queued default-branch job blocked all
   version-specific jobs for the same repo. Fix: include version_id in the
   WHERE clause so only exact (repository_id, version_id) pairs are deduped.

2. POST /api/v1/libs/:id/versions used repoService.createIndexingJob() which
   inserts a job record but never triggers queue processing. Fix: use
   queue.enqueue() (same fallback pattern as the libs endpoint) so setImmediate
   fires processNext() after the job is inserted.

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

src/lib/server/pipeline/job-queue.ts

@@ -36,14 +36,17 @@ export class JobQueue {
 	 * existing job instead of creating a duplicate.
 	 */
 	enqueue(repositoryId: string, versionId?: string): IndexingJob {
-		// Return early if there's already an active job for this repo.
+		// Return early if there's already an active job for this exact (repo, version) pair.
+		const resolvedVersionId = versionId ?? null;
 		const activeRaw = this.db
-			.prepare<[string], IndexingJobEntity>(
+			.prepare<[string, string | null, string | null], IndexingJobEntity>(
 				`${JOB_SELECT}
-         WHERE repository_id = ? AND status IN ('queued', 'running')
+         WHERE repository_id = ?
+           AND (version_id = ? OR (version_id IS NULL AND ? IS NULL))
+           AND status IN ('queued', 'running')
          ORDER BY created_at DESC LIMIT 1`
 			)
-			.get(repositoryId);
+			.get(repositoryId, resolvedVersionId, resolvedVersionId);
 
 		if (activeRaw) {
 			// Ensure the queue is draining even if enqueue was called concurrently.

src/lib/server/services/repository.service.test.ts

@@ -529,4 +529,24 @@ describe('RepositoryService.createIndexingJob()', () => {
 		const job = service.createIndexingJob('/facebook/react', '/facebook/react/v18.3.0');
 		expect(job.versionId).toBe('/facebook/react/v18.3.0');
 	});
+
+	it('allows separate jobs for the same repo but different versions', () => {
+		const defaultJob = service.createIndexingJob('/facebook/react');
+		const versionJob = service.createIndexingJob('/facebook/react', '/facebook/react/v18.3.0');
+		expect(versionJob.id).not.toBe(defaultJob.id);
+		expect(defaultJob.versionId).toBeNull();
+		expect(versionJob.versionId).toBe('/facebook/react/v18.3.0');
+	});
+
+	it('returns the existing job when the same (repo, version) pair is already queued', () => {
+		const job1 = service.createIndexingJob('/facebook/react', '/facebook/react/v18.3.0');
+		const job2 = service.createIndexingJob('/facebook/react', '/facebook/react/v18.3.0');
+		expect(job2.id).toBe(job1.id);
+	});
+
+	it('returns the existing default-branch job when called again without a versionId', () => {
+		const job1 = service.createIndexingJob('/facebook/react');
+		const job2 = service.createIndexingJob('/facebook/react');
+		expect(job2.id).toBe(job1.id);
+	});
 });

src/lib/server/services/repository.service.ts

@@ -319,14 +319,17 @@ export class RepositoryService {
 	 * If a job is already running, returns the existing job.
 	 */
 	createIndexingJob(repositoryId: string, versionId?: string): IndexingJob {
-		// Check for running job
+		// Check for an existing queued/running job for this exact (repo, version) pair.
+		const resolvedVersionId = versionId ?? null;
 		const runningJob = this.db
 			.prepare(
 				`SELECT * FROM indexing_jobs
-           WHERE repository_id = ? AND status IN ('queued', 'running')
+           WHERE repository_id = ?
+             AND (version_id = ? OR (version_id IS NULL AND ? IS NULL))
+             AND status IN ('queued', 'running')
            ORDER BY created_at DESC LIMIT 1`
 			)
-			.get(repositoryId) as IndexingJobEntity | undefined;
+			.get(repositoryId, resolvedVersionId, resolvedVersionId) as IndexingJobEntity | undefined;
 
 		if (runningJob) return IndexingJobMapper.fromEntity(new IndexingJobEntity(runningJob));