fix(pipeline): fix mark-failed CSS bug + add per-extractor run buttons

- Redirect pipeline_mark_stale to pipeline_dashboard (full page) instead
  of pipeline_extractions (partial), fixing the broken CSS on form submit
- pipeline_trigger_extract accepts optional 'extractor' POST field;
  validates against workflows.toml names to prevent injection, passes
  as payload to enqueue("run_extraction")
- handle_run_extraction dispatches to per-extractor CLI entry point
  (extract-overpass, extract-eurostat, etc.) when extractor is set,
  falls back to umbrella 'extract' command otherwise
- pipeline_overview.html: add Run button to each workflow card header,
  posting extractor name with CSRF token to pipeline_trigger_extract

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

web/src/padelnomics/admin/pipeline_routes.py

@@ -515,7 +515,7 @@ async def pipeline_mark_stale(run_id: int):
         await flash(f"Run #{run_id} marked as failed.", "success")
     else:
         await flash(f"Run #{run_id} could not be updated (not in 'running' state).", "warning")
-    return redirect(url_for("pipeline.pipeline_extractions"))
+    return redirect(url_for("pipeline.pipeline_dashboard"))
 
 
 # ── Trigger extraction ────────────────────────────────────────────────────────
@@ -525,11 +525,23 @@ async def pipeline_mark_stale(run_id: int):
 @role_required("admin")
 @csrf_protect
 async def pipeline_trigger_extract():
-    """Enqueue a full pipeline extraction run."""
+    """Enqueue an extraction run — all extractors, or a single named one."""
     from ..worker import enqueue
 
-    await enqueue("run_extraction")
-    await flash("Extraction run queued. Check the task queue for progress.", "success")
+    form = await request.form
+    extractor = (form.get("extractor") or "").strip()
+
+    if extractor:
+        valid_names = {wf["name"] for wf in await asyncio.to_thread(_load_workflows)}
+        if extractor not in valid_names:
+            await flash(f"Unknown extractor '{extractor}'.", "warning")
+            return redirect(url_for("pipeline.pipeline_dashboard"))
+        await enqueue("run_extraction", {"extractor": extractor})
+        await flash(f"Extractor '{extractor}' queued. Check the task queue for progress.", "success")
+    else:
+        await enqueue("run_extraction")
+        await flash("Extraction run queued. Check the task queue for progress.", "success")
+
     return redirect(url_for("pipeline.pipeline_dashboard"))