feat: add document pipeline — PDF decoder, Ollama LLM, storage services

Add end-to-end document processing pipeline:
- PDF decoder service (pdfjs-dist) extracts text per page from librarian docs
- Ollama native LLM service for local model inference
- FalkorDB triples store FlowProcessor consumer
- Qdrant graph embeddings store FlowProcessor consumer
- Fix spec name collisions in chunker/extractor (input→chunk-input, etc.)
- Gateway /load endpoint to trigger document processing
- Align flow manager blueprint and seed config with full pipeline topics
- Add runner scripts and test coverage for document load

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ts/scripts/run-pdf-decoder.ts

@@ -0,0 +1,14 @@
+/**
+ * Start the PDF decoder service.
+ *
+ * Usage: pnpm tsx scripts/run-pdf-decoder.ts
+ *
+ * Env:
+ *   NATS_URL (default: nats://localhost:4222)
+ */
+import { run } from "../packages/flow/src/decoding/pdf-decoder.js";
+
+run().catch((err) => {
+  console.error("PDF decoder service failed:", err);
+  process.exit(1);
+});