feat(profile): /api/profile + eligibility filter + inference framework (ADR-0014 steps 4-6)

Step 4 — /api/profile read-through API:
  GET  /api/profile          → { user, prefs, consents, contexts }
  PATCH /api/profile/prefs/:scope  upsert user_preferences (source='user')
  PATCH /api/profile/consents      grant / revoke consent keys
  PATCH /api/profile/contexts      create / activate / deactivate contexts
  Legacy consentGiven bit folded in as data:core fallback.

Step 5 — registry-driven eligibility filter:
  fetchRegistry() exported from agent-registry.ts.
  profile/eligibility.ts: getEligibleAgentIds(userId) — filters by required
  consents, silenced_in_contexts, and user_preferences[enabled=false].
  fetchOrchestratorTip filters agent_outputs to eligible set before calling
  ml/serving /recommend. Fail-closed: registry unavailable → empty set.

Step 6 — shared context-inference framework (#111) + time-of-day proof (#112):
  ml/agents/inference/: UserHistory, FeedbackEvent, run_inference().
  Framework: cold-start, min_history gating, error fallback, structured logs.
  TimeOfDayAgent v1.1.0: inferred_params=[preferred_hour]; also reads
  quiet_start/quiet_end from agent_prefs. agent_prefs injected by TS caller.
  AgentInput gains agent_prefs field.
  ml/serving: POST /agents/{agent_id}/infer endpoint.
  agent-outputs.ts computeAndStore: loads prefs before compute, calls /infer
  after, persists results (source='inferred'); user overrides never touched.

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

ml/agents/inference/history.py

@@ -0,0 +1,29 @@
+"""UserHistory — normalised view of a user's feedback events for inference."""
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from datetime import datetime, timezone
+
+
+@dataclass
+class FeedbackEvent:
+    action: str              # 'done' | 'dismiss' | 'snooze' | 'helpful' | 'not_helpful'
+    dwell_ms: int | None
+    created_at: str          # ISO 8601
+
+    @property
+    def hour(self) -> int:
+        """Hour of day (0-23) when the feedback was recorded."""
+        try:
+            dt = datetime.fromisoformat(self.created_at.replace("Z", "+00:00"))
+        except ValueError:
+            return 12
+        if dt.tzinfo is None:
+            dt = dt.replace(tzinfo=timezone.utc)
+        return dt.hour
+
+
+@dataclass
+class UserHistory:
+    user_id: str
+    events: list[FeedbackEvent] = field(default_factory=list)