run fundamentals weekly, not daily — it's quarterly-ish data

Pulled the fundamental collector out of the daily pipeline (where it re-fetched
near-identical numbers every day and burned free-tier API quota) and made it an
independent weekly job. P/E/market-cap drift with price but the score buckets
them coarsely; revenue growth and earnings surprise only change at quarterly
earnings. Added "weekly" to the frequency map; fundamental_fetch_frequency now
defaults to weekly (configurable).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/unit/test_scheduler.py

@@ -23,8 +23,11 @@ class TestParseFrequency:
         assert _parse_frequency("Hourly") == {"hours": 1}
         assert _parse_frequency("DAILY") == {"hours": 24}
 
+    def test_weekly_maps_to_one_week(self):
+        assert _parse_frequency("weekly") == {"weeks": 1}
+
     def test_unknown_defaults_to_daily(self):
-        assert _parse_frequency("weekly") == {"hours": 24}
+        assert _parse_frequency("monthly") == {"hours": 24}
         assert _parse_frequency("") == {"hours": 24}