chore: decommission FMP, Finnhub and Alpha Vantage (A6)

The A5 cutover has been on and observed in production, so SEC Company Facts +
DoltHub earnings are already the live source for `fundamental_data`. This
removes everything the legacy path still occupied.

Gone: the three providers and their config/env keys; the weekly
`fundamental_collector` job; the cutover toggle (SEC + Dolt is now the
unconditional path, so `off` can no longer silently freeze scoring inputs); the
A5 parity report, whose deltas became structurally zero once the candidate
builder started writing the table it compared against; and the FMP tier of
universe bootstrap.

Two behavioral notes:

- Disabling **SEC Fundamentals Import** now stops the SEC network fetch only.
  The local cache refresh moved outside the job-enable check, because candidates
  also derive from daily closes and earnings events — freezing those on an
  ingestion pause would stale scoring with no fallback left to recover from.
- `/ingestion/fetch?sources=fundamentals` still accepts the key and reports
  `skipped`; there is no per-ticker fetch any more.

Migration 029 does not blanket-delete the leftover settings rows. Migrations run
before the service restart, and pre-A6 code reads an absent `job_*_enabled` row
as *enabled* — so the two behavior-bearing keys become tombstones pinned to safe
values (hidden in Admin) and only the inert three are deleted. Removing the
provider keys from the production `.env` is the matching rollout step.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/unit/test_schedule_config.py

@@ -66,26 +66,11 @@ class TestTradingDayCrons:
         assert "Mon" in weekdays, f"{key} skips Mondays — numeric day-of-week?"
         assert {"Sat", "Sun"}.isdisjoint(weekdays), f"{key} fires on a weekend"
 
-    def test_fundamentals_runs_on_monday(self):
-        from datetime import datetime
-
-        from apscheduler.triggers.cron import CronTrigger
-
-        trigger = CronTrigger.from_crontab(
-            SCHEDULE_DEFAULTS["schedule_fundamentals_cron"],
-            timezone=SCHEDULE_DEFAULTS["schedule_timezone"],
-        )
-        fire = trigger.get_next_fire_time(
-            None, datetime(2026, 7, 19, tzinfo=trigger.timezone)
-        )
-        assert fire.strftime("%a") == "Mon"
-
     @pytest.mark.parametrize(
         ("key", "hour", "minute"),
         (
             ("schedule_dolt_earnings_cron", 2, 30),
             ("schedule_sec_fundamentals_cron", 4, 0),
-            ("schedule_fundamentals_parity_cron", 5, 30),
         ),
     )
     def test_shadow_imports_run_daily_at_expected_et_time(
@@ -122,7 +107,7 @@ class TestScheduleConfig:
 
     async def test_rejects_bad_cron(self, session: AsyncSession):
         with pytest.raises(ValidationError):
-            await update_schedule_config(session, {"schedule_fundamentals_cron": "every monday"})
+            await update_schedule_config(session, {"schedule_daily_pipeline_cron": "every monday"})
 
     async def test_rejects_bad_timezone(self, session: AsyncSession):
         with pytest.raises(ValidationError):