feat(features): mirror invalidatedBy into Python ProfileFeature (#61)

Adds invalidated_by: tuple[str, ...] to ProfileFeature, mirroring the
invalidatedBy bus subjects from registry.ts. Adds a test that parses the
TS source and asserts Python stays in sync — same drift-detection pattern
used for names and ttlSec.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ml/features/profile_schema.py

@@ -10,10 +10,12 @@ Update this file whenever you add or rename a feature in the TS registry.
 The accompanying test asserts the two stay in sync at the name level.
 
 Feature-spec fields (issue #61):
-  freshness — "batched": value cached in profile store, recomputed on TTL/event.
-  ttl_sec   — cache lifetime in seconds; mirrors ``ttlSec`` in registry.ts.
-  source    — where the value originates.
-  fallback  — raw value returned when the feature is unavailable (null stored).
+  freshness      — "batched": value cached in profile store, recomputed on TTL/event.
+  ttl_sec        — cache lifetime in seconds; mirrors ``ttlSec`` in registry.ts.
+  source         — where the value originates.
+  fallback       — raw value returned when the feature is unavailable (null stored).
+  invalidated_by — bus event subjects that trigger recompute for the affected user;
+                   mirrors ``invalidatedBy`` in registry.ts. Empty = TTL-only refresh.
 """
 from __future__ import annotations
 
@@ -37,6 +39,7 @@ class ProfileFeature:
     ttl_sec: int
     source: str
     fallback: str
+    invalidated_by: tuple[str, ...] = ()
 
 
 PROFILE_FEATURES: tuple[ProfileFeature, ...] = (
@@ -48,6 +51,7 @@ PROFILE_FEATURES: tuple[ProfileFeature, ...] = (
         ttl_sec=6 * _HOUR,
         source="profile_store",
         fallback="0.0",
+        invalidated_by=("signals.tip.feedback",),
     ),
     ProfileFeature(
         name="dismiss_rate_30d",
@@ -57,6 +61,7 @@ PROFILE_FEATURES: tuple[ProfileFeature, ...] = (
         ttl_sec=6 * _HOUR,
         source="profile_store",
         fallback="0.0",
+        invalidated_by=("signals.tip.feedback",),
     ),
     ProfileFeature(
         name="mean_dwell_ms_30d",
@@ -66,6 +71,7 @@ PROFILE_FEATURES: tuple[ProfileFeature, ...] = (
         ttl_sec=6 * _HOUR,
         source="profile_store",
         fallback="null — serving normalises to 0.0",
+        invalidated_by=("signals.tip.feedback",),
     ),
     ProfileFeature(
         name="preferred_hour",
@@ -75,6 +81,7 @@ PROFILE_FEATURES: tuple[ProfileFeature, ...] = (
         ttl_sec=_DAY,
         source="profile_store",
         fallback="null — serving normalises to 0.5 (neutral alignment)",
+        invalidated_by=("signals.tip.feedback",),
     ),
     ProfileFeature(
         name="tip_volume_30d",
@@ -84,6 +91,7 @@ PROFILE_FEATURES: tuple[ProfileFeature, ...] = (
         ttl_sec=_HOUR,
         source="profile_store",
         fallback="0",
+        invalidated_by=("signals.tip.served",),
     ),
 )