fix: rename remaining Arts & Culture → Arts & Workshops references

CI broke after the category merge because:
1. recommendation_bigquery.SEGMENT_TO_CATEGORY still mapped Ticketmaster's
   "Arts & Theatre" segment to the old "Arts & Culture" name. The runtime
   invariant in that module compares this mapping against ALLOWED_CATEGORIES
   and asserts at import time — which is why every test file errored at
   collection rather than just one test.
2. test_events_endpoint.py hardcoded "Arts & Culture" in two assertions.

All 88 tests pass locally now.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: saisri27

recommendation_bigquery.py

@@ -50,7 +50,7 @@ def _bq_client() -> bigquery.Client:
 # "Family"/"Film" feed.
 SEGMENT_TO_CATEGORY: dict[str, str] = {
     "Music": "Music & Live Shows",
-    "Arts & Theatre": "Arts & Culture",
+    "Arts & Theatre": "Arts & Workshops",
     "Sports": "Sports & Recreation",
     "Family": "Entertainment",
     "Film": "Entertainment",
@@ -220,7 +220,7 @@ def fetch_events_from_bigquery(
 
     Args:
         categories: user-selected canonical categories (e.g. ["Entertainment",
-            "Arts & Culture"]). Empty list returns []. We SELECT all upcoming
+            "Arts & Workshops"]). Empty list returns []. We SELECT all upcoming
             events whose Ticketmaster segment maps to one of these.
         max_distance_km: filter on distance_miles converted to km in SQL.
         days_ahead: only include events starting within this many days; clamps

tests/test_events_endpoint.py

@@ -66,7 +66,7 @@ def __init__(self, *a, **kw):
     "segment, expected",
     [
         ("Music", "Music & Live Shows"),  # Music has its own chip — 51% of event volume
-        ("Arts & Theatre", "Arts & Culture"),
+        ("Arts & Theatre", "Arts & Workshops"),
         ("Sports", "Sports & Recreation"),
         ("Family", "Entertainment"),
         ("Film", "Entertainment"),
@@ -138,10 +138,10 @@ def test_fetch_events_maps_segment_to_canonical_category():
         },
     ]
     out = rb.fetch_events_from_bigquery(
-        ["Arts & Culture"], 10.0, client=_make_fake_client(fake_rows)
+        ["Arts & Workshops"], 10.0, client=_make_fake_client(fake_rows)
     )
     assert len(out) == 1
-    assert out[0]["category"] == "Arts & Culture"
+    assert out[0]["category"] == "Arts & Workshops"
     assert out[0]["segment"] == "Arts & Theatre"