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/app/bills/[id]/page.tsx

@@ -9,6 +9,7 @@ import { BriefPanel } from "@/components/bills/BriefPanel";
 import { DraftLetterPanel } from "@/components/bills/DraftLetterPanel";
 import { NotesPanel } from "@/components/bills/NotesPanel";
 import { ActionTimeline } from "@/components/bills/ActionTimeline";
+import { VotePanel } from "@/components/bills/VotePanel";
 import { TrendChart } from "@/components/bills/TrendChart";
 import { NewsPanel } from "@/components/bills/NewsPanel";
 import { FollowButton } from "@/components/shared/FollowButton";
@@ -170,6 +171,7 @@ export default function BillDetailPage({ params }: { params: Promise<{ id: strin
             latestActionDate={bill.latest_action_date}
             latestActionText={bill.latest_action_text}
           />
+          <VotePanel billId={bill.bill_id} />
         </div>
         <div className="space-y-4">
           <TrendChart data={trendData} />