feat(dashboard): add forward "what's next" signal + fix upcoming floor

The daily-file bill queue is a backward snapshot, so "upcoming" could only
resurface the latest past day (the 08-31 snapshot read as today's queue) and
there was no "what is scheduled next." leginfo bill status/history are
backward-only, so the genuine future-dated signal is the chambers' "upcoming
events" calendars.

- api.py: floor the "upcoming" view at *today* (not the DB max date) when no
  as_of is pinned; surface next_legislative_day + scheduled_events (next 7
  days) on /bills. Add _today_iso / _next_legislative_day / _scheduled_events,
  all degrading to a recess marker / [] (never 5xx).
- relational.py: schema v2 adds the scheduled_events table +
  store_scheduled_events (idempotent per-day refresh), load_scheduled_events,
  next_legislative_day.
- parsers.py: parse_events_page + classify_event_kind for the chamber events
  calendar; skip empty-title rows (decompose the <time> before the fallback).
- ingest.py + cli.py: --store-events lane (cache-first, recess-safe) that
  parses the calendar HTML into scheduled_events.
- sources.py + config.yaml: register assembly_events / senate_events
  (kind: events, empty_is_ok: true).
- run_ingest.sh: run the events lane after the daily-file lane as non-fatal
  (skippable via CALI_SCRAPER_SKIP_EVENTS=1); daily-file exit still gates cron.
- frontend: "Next legislative day" line + "What's next · next 7 days" band
  with honest recess empty states.
- DASHBOARD.md: document the forward signal + known limitations (leginfo
  backward-only gap, recess empty state, 08-31 snapshot is analysis-only).
- tests: 5 new API tests + 18 parse-events tests; 170 pass, 92% coverage.

scraper/dashboard/static/index.html

@@ -33,10 +33,11 @@
 <main id="app">
     <!-- §9 status / context band -->
     <section class="freshness" id="freshness" aria-live="polite">
-        <span id="freshness-updated">Loading…</span>
-        <span id="freshness-session" class="badge"></span>
-        <span id="freshness-chamber" class="note"></span>
-        <button type="button" id="btn-refresh" class="ghost">Refresh</button>
+          <span id="freshness-updated">Loading…</span>
+          <span id="freshness-session" class="badge"></span>
+          <span id="freshness-chamber" class="note"></span>
+          <span id="freshness-next-day" class="note"></span>
+          <button type="button" id="btn-refresh" class="ghost">Refresh</button>
     </section>
 
     <!-- Controls bar -->
@@ -64,9 +65,17 @@
             <input type="checkbox" id="f-reason" title="Show why each
                 floated bill is in your view">
         </label>
-    </section>
+      </section>
 
-    <!-- Logged-in personal controls (ZIP + watch/opt-in) -->
+      <!-- What's next: forward-looking chamber events calendar (scheduled_events) -->
+      <section class="band next-band" id="next-band" aria-label="Next 7 days">
+          <h2 class="band-title">What's next · next 7 days
+              <span id="next-count" class="count"></span></h2>
+          <div id="next-list" class="list next-list"></div>
+          <div id="next-empty" class="empty-state" hidden></div>
+      </section>
+
+      <!-- Logged-in personal controls (ZIP + watch/opt-in) -->
     <section class="personal-controls" id="personal-controls" hidden>
         <div class="zip-lookup">
             <label for="zip-input">Where do you live?</label>