feat: real PDF pipeline test — end-to-end knowledge extraction working

Add full pipeline test that generates a real PDF, processes it through
the entire pipeline, and verifies knowledge lands in FalkorDB:

- Create test PDF generator using pdf-lib (2-page doc about Acme Corp)
- Add testFullPipeline() to integration tests with store verification
- Fix FalkorDB client connect() — createClient returns unconnected client
  in both TriplesStore and TriplesQuery classes

Results: PDF decoded (2 pages) → chunked (2 chunks) → extracted
(4 relationships) → 16 triples stored in FalkorDB including:
  alice-johnson → is-a-senior-engineer → acme-corporation
  cloudsync → uses-aws-for-hosting → amazon-web-services
  provenance: pages → prov:wasDerivedFrom → source document

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

ts/scripts/create-test-pdf.ts

@@ -0,0 +1,67 @@
+/**
+ * Generate a test PDF for pipeline testing.
+ *
+ * Creates a 2-page PDF with clear entity relationships that the
+ * extractor can identify. Writes to data/test.pdf.
+ */
+
+import { PDFDocument, StandardFonts } from "pdf-lib";
+import { writeFileSync, mkdirSync } from "fs";
+
+const PAGE_1 = `Acme Corporation: Company Overview
+
+Alice Johnson is a senior engineer at Acme Corporation. She has been with the company since 2020 and leads the backend engineering team.
+
+Acme Corporation develops CloudSync, a cloud storage platform designed for enterprise customers. CloudSync uses Amazon Web Services (AWS) infrastructure for hosting and runs on Kubernetes for container orchestration.
+
+CloudSync provides automatic file synchronization, end-to-end encryption, and team collaboration features. The platform serves over 500 enterprise clients worldwide.`;
+
+const PAGE_2 = `Acme Corporation: Leadership and Competition
+
+Bob Chen is the Chief Technology Officer (CTO) of Acme Corporation. Alice Johnson reports directly to Bob. Together they oversee the technical direction of CloudSync.
+
+CloudSync was officially launched in January 2024. The platform competes with established players including Dropbox, Google Drive, and Microsoft OneDrive.
+
+Acme Corporation is headquartered in San Francisco, California. The company employs approximately 200 people across engineering, sales, and operations departments.`;
+
+async function main(): Promise<void> {
+  const pdf = await PDFDocument.create();
+  const font = await pdf.embedFont(StandardFonts.Helvetica);
+  const boldFont = await pdf.embedFont(StandardFonts.HelveticaBold);
+
+  for (const [i, text] of [PAGE_1, PAGE_2].entries()) {
+    const page = pdf.addPage([612, 792]); // US Letter
+    const lines = text.split("\n");
+    let y = 750;
+
+    for (const line of lines) {
+      if (!line.trim()) {
+        y -= 14;
+        continue;
+      }
+
+      const isTitle = i === 0 ? line.startsWith("Acme") : line.startsWith("Acme");
+      const useFont = line === lines[0] ? boldFont : font;
+      const size = line === lines[0] ? 16 : 11;
+
+      page.drawText(line.trim(), {
+        x: 50,
+        y,
+        size,
+        font: useFont,
+      });
+      y -= size + 6;
+    }
+  }
+
+  const pdfBytes = await pdf.save();
+
+  mkdirSync("data", { recursive: true });
+  writeFileSync("data/test.pdf", pdfBytes);
+  console.log(`Created data/test.pdf (${pdfBytes.length} bytes, 2 pages)`);
+}
+
+main().catch((err) => {
+  console.error("Failed to create test PDF:", err);
+  process.exit(1);
+});