chore: add batch job debug logging to worker

Temporary: logs batch job errors and surfaces harvest failures in
result limitations field for remote debugging.

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

app/worker.py

@@ -98,6 +98,14 @@ async def process_job(job_id: str, db: Database, registry: IndicatorRegistry) ->
                     del pending[indicator_id]
                 elif any(s in ("error", "canceled") for s in statuses):
                     logger.warning("Batch job failed for %s: %s", indicator_id, statuses)
+                    # Log batch job errors for debugging
+                    for j in jobs:
+                        if j.status() == "error":
+                            try:
+                                logs = j.logs()
+                                logger.warning("Batch job %s logs: %s", j.job_id, logs)
+                            except Exception:
+                                pass
                     del pending[indicator_id]
 
             if not pending:
@@ -124,12 +132,18 @@ async def process_job(job_id: str, db: Database, registry: IndicatorRegistry) ->
                 )
             elif indicator_id in batch_submissions:
                 await db.update_job_progress(job_id, indicator_id, "downloading")
+                batch_jobs = batch_submissions[indicator_id]
+                batch_statuses = [j.status() for j in batch_jobs]
+                await db.update_job_progress(
+                    job_id, indicator_id,
+                    f"downloading (batch statuses: {batch_statuses})",
+                )
                 try:
                     result = await indicator.harvest(
                         job.request.aoi,
                         job.request.time_range,
                         season_months=job.request.season_months(),
-                        batch_jobs=batch_submissions[indicator_id],
+                        batch_jobs=batch_jobs,
                     )
                 except Exception as exc:
                     logger.warning("Harvest failed for %s, using fallback: %s", indicator_id, exc)
@@ -138,6 +152,7 @@ async def process_job(job_id: str, db: Database, registry: IndicatorRegistry) ->
                         job.request.time_range,
                         season_months=job.request.season_months(),
                     )
+                    result.limitations.append(f"Debug: harvest failed: {type(exc).__name__}: {exc}")
             else:
                 await db.update_job_progress(job_id, indicator_id, "processing")
                 result = await indicator.process(