Limit bills to last 2 months + filter out procedural resolutions

- Drop hres/sres/hconres/sconres (simple/concurrent resolutions) from poller;
  only track hr, s, hjres, sjres (legislation that can become law)
- On first run, seed from 60 days back instead of full congress history,
  keeping the bill count to ~1,600 instead of 13,000+

Authored-By: Jack Levy

backend/app/workers/congress_poller.py

@@ -6,7 +6,7 @@ Uses fromDateTime to fetch only recently updated bills.
 All operations are idempotent.
 """
 import logging
-from datetime import datetime, timezone
+from datetime import datetime, timedelta, timezone
 
 from app.database import get_sync_db
 from app.models import Bill, BillAction, Member, AppSetting
@@ -30,12 +30,21 @@ def _set_setting(db, key: str, value: str) -> None:
     db.commit()
 
 
+# Only track legislation that can become law. Simple/concurrent resolutions
+# (hres, sres, hconres, sconres) are procedural and not worth analyzing.
+TRACKED_BILL_TYPES = {"hr", "s", "hjres", "sjres"}
+
+
 @celery_app.task(bind=True, max_retries=3, name="app.workers.congress_poller.poll_congress_bills")
 def poll_congress_bills(self):
     """Fetch recently updated bills from Congress.gov and enqueue document + LLM processing."""
     db = get_sync_db()
     try:
         last_polled = _get_setting(db, "congress_last_polled_at")
+        # On first run, seed from 2 months back rather than the full congress history
+        if not last_polled:
+            two_months_ago = datetime.now(timezone.utc) - timedelta(days=60)
+            last_polled = two_months_ago.strftime("%Y-%m-%dT%H:%M:%SZ")
         current_congress = congress_api.get_current_congress()
         logger.info(f"Polling Congress {current_congress} (since {last_polled})")
 
@@ -56,6 +65,8 @@ def poll_congress_bills(self):
 
             for bill_data in bills_data:
                 parsed = congress_api.parse_bill_from_api(bill_data, current_congress)
+                if parsed.get("bill_type") not in TRACKED_BILL_TYPES:
+                    continue
                 bill_id = parsed["bill_id"]
                 existing = db.get(Bill, bill_id)