feat(TRUEREF-0009-0010): implement indexing pipeline job queue and public REST API

- SQLite-backed job queue with sequential processing and startup recovery
- Atomic snippet replacement in single transaction
- context7-compatible GET /api/v1/libs/search and GET /api/v1/context
- Token budget limiting and JSON/txt response format support
- CORS headers on all API routes via SvelteKit handle hook
- Library ID parser supporting /owner/repo and /owner/repo/version

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

src/routes/api/v1/libs/search/+server.ts

@@ -0,0 +1,64 @@
+/**
+ * GET /api/v1/libs/search
+ *
+ * Search libraries by name. Compatible with context7's
+ * GET /api/v2/libs/search interface.
+ *
+ * Query parameters:
+ *   libraryName  (required) — library name to search for
+ *   query        (optional) — user's question for relevance ranking
+ *   limit        (optional) — max results, default 10, max 50
+ *   type         (optional) — "json" (default) or "txt"
+ */
+
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { getClient } from '$lib/server/db/client';
+import { SearchService } from '$lib/server/search/search.service';
+import { formatLibrarySearchJson } from '$lib/server/api/formatters';
+import { CORS_HEADERS } from '$lib/server/api/formatters';
+
+function getService(): SearchService {
+	return new SearchService(getClient());
+}
+
+export const GET: RequestHandler = ({ url }) => {
+	const libraryName = url.searchParams.get('libraryName');
+
+	if (!libraryName || !libraryName.trim()) {
+		return new Response(
+			JSON.stringify({ error: 'libraryName is required', code: 'MISSING_PARAMETER' }),
+			{
+				status: 400,
+				headers: { 'Content-Type': 'application/json', ...CORS_HEADERS }
+			}
+		);
+	}
+
+	const query = url.searchParams.get('query') ?? undefined;
+	const limitRaw = parseInt(url.searchParams.get('limit') ?? '10', 10);
+	const limit = Math.min(isNaN(limitRaw) || limitRaw < 1 ? 10 : limitRaw, 50);
+
+	try {
+		const service = getService();
+		const results = service.searchRepositories({ libraryName, query, limit });
+		const body = formatLibrarySearchJson(results);
+
+		return json(body, {
+			headers: CORS_HEADERS
+		});
+	} catch (err) {
+		const message = err instanceof Error ? err.message : 'Internal server error';
+		return new Response(JSON.stringify({ error: message, code: 'INTERNAL_ERROR' }), {
+			status: 500,
+			headers: { 'Content-Type': 'application/json', ...CORS_HEADERS }
+		});
+	}
+};
+
+export const OPTIONS: RequestHandler = () => {
+	return new Response(null, {
+		status: 204,
+		headers: CORS_HEADERS
+	});
+};