feat: retry failed extractions button on pipeline page

- POST /api/ops/pipeline/retry-failed endpoint resets extraction_failed
  docs to parsed, deletes failed intelligence rows, and re-enqueues
  them (batch of 200)
- Scheduler now auto-retries extraction_failed docs every ~10 minutes
  (100 per cycle, 60-min cooldown per doc)
- Pipeline page shows 'Retry Failed (N)' button when extraction_failed
  count > 0, with pending/success/error states

services/api/app.py

@@ -1869,6 +1869,58 @@ async def pipeline_stream(request: Request):
     )
 
 
+@app.post("/api/ops/pipeline/retry-failed")
+async def retry_failed_extractions_endpoint():
+    """Re-enqueue documents stuck in extraction_failed for another attempt.
+
+    Resets up to 200 extraction_failed documents back to 'parsed',
+    deletes their failed intelligence rows, and pushes them onto the
+    extraction queue.  Returns the count of documents re-enqueued.
+    """
+    rows = await pool.fetch(
+        """SELECT d.id, d.document_type, dcm.ticker
+           FROM documents d
+           LEFT JOIN document_company_mentions dcm ON d.id = dcm.document_id
+           WHERE d.status = 'extraction_failed'
+           ORDER BY d.updated_at ASC
+           LIMIT 200""",
+    )
+
+    if not rows:
+        return {"retried": 0, "message": "No extraction-failed documents to retry"}
+
+    doc_ids = []
+    for row in rows:
+        doc_type = row["document_type"]
+        if doc_type == "macro_event":
+            target = "stonks:queue:macro_classification"
+        else:
+            target = "stonks:queue:extraction"
+
+        await rds.rpush(target, json.dumps({
+            "document_id": str(row["id"]),
+            "ticker": row["ticker"] or "",
+        }))
+        doc_ids.append(row["id"])
+
+    # Delete failed intelligence rows so extractor starts fresh
+    await pool.execute(
+        """DELETE FROM document_intelligence
+           WHERE document_id = ANY($1::uuid[])
+             AND validation_status = 'failed'""",
+        doc_ids,
+    )
+    # Reset status to 'parsed' and touch updated_at
+    await pool.execute(
+        """UPDATE documents
+           SET status = 'parsed', updated_at = NOW()
+           WHERE id = ANY($1::uuid[])""",
+        doc_ids,
+    )
+
+    return {"retried": len(doc_ids), "message": f"Re-enqueued {len(doc_ids)} documents for extraction"}
+
+
 @app.get("/api/ops/sources/coverage-gaps")
 async def get_source_coverage_gaps():
     """Identify symbols with missing or insufficient source coverage.