feat: roll-call votes + granular alert filter fix (v0.9.5)

Roll-call votes:
- Migration 0017: bill_votes + member_vote_positions tables
- Fetch vote XML directly from House Clerk / Senate LIS URLs
  embedded in bill actions recordedVotes objects
- GET /api/bills/{id}/votes triggers background fetch on first view
- VotePanel on bill detail: yea/nay bar, result badge, followed
  member positions with Sen./Rep. title, party badge, and state

Alert filter fix:
- _should_dispatch returns True when alert_filters is None so users
  who haven't saved filters still receive all notifications

Authored-By: Jack Levy

frontend/lib/api.ts

@@ -3,6 +3,7 @@ import type {
   Bill,
   BillAction,
   BillDetail,
+  BillVote,
   BriefSchema,
   Collection,
   CollectionDetail,
@@ -78,6 +79,8 @@ export const billsAPI = {
     apiClient.get<NewsArticle[]>(`/api/bills/${id}/news`).then((r) => r.data),
   getTrend: (id: string, days?: number) =>
     apiClient.get<TrendScore[]>(`/api/bills/${id}/trend`, { params: { days } }).then((r) => r.data),
+  getVotes: (id: string) =>
+    apiClient.get<BillVote[]>(`/api/bills/${id}/votes`).then((r) => r.data),
   generateDraft: (id: string, body: {
     stance: string;
     recipient: string;