Add bill action pipeline, admin health panel, and LLM provider fixes

- Fetch bill actions from Congress.gov and populate the action timeline
- Add nightly batch task and beat schedule for active bill actions
- Add admin reprocess endpoint for per-bill debugging
- Add BriefPanel with "What Changed" view and version history
- Add External API Health section with per-source latency testing
- Redesign Manual Controls as health panel with status dots and descriptions
- Add Resume Analysis task for stalled LLM jobs
- Add Backfill Dates & Links task for bills with null metadata
- Fix LLM provider/model DB overrides being ignored (env vars used instead)
- Fix Gemini 404: gemini-1.5-pro deprecated → gemini-2.0-flash
- Fix Anthropic models list: use REST API directly (SDK too old for .models)
- Replace test-LLM full analysis with lightweight ping (max_tokens=20)
- Add has_document field to BillDetail; show "No bill text published" state
- Fix "Introduced: —" showing for bills with null introduced_date
- Add bills_missing_sponsor and bills_missing_metadata to admin stats
- Add GovInfo health check using /collections endpoint (fixes 500 from /packages)

Authored-By: Jack Levy

backend/app/schemas/schemas.py

@@ -3,6 +3,23 @@ from typing import Any, Generic, Optional, TypeVar
 
 from pydantic import BaseModel
 
+
+# ── Notifications ──────────────────────────────────────────────────────────────
+
+class NotificationSettingsResponse(BaseModel):
+    ntfy_topic_url: str = ""
+    ntfy_token: str = ""
+    ntfy_enabled: bool = False
+    rss_token: Optional[str] = None
+
+    model_config = {"from_attributes": True}
+
+
+class NotificationSettingsUpdate(BaseModel):
+    ntfy_topic_url: Optional[str] = None
+    ntfy_token: Optional[str] = None
+    ntfy_enabled: Optional[bool] = None
+
 T = TypeVar("T")
 
 
@@ -144,6 +161,7 @@ class BillDetailSchema(BillSchema):
     news_articles: list[NewsArticleSchema] = []
     trend_scores: list[TrendScoreSchema] = []
     briefs: list[BriefSchema] = []
+    has_document: bool = False
 
 
 # ── Follow ────────────────────────────────────────────────────────────────────