feat(ml/serving): inject profile features + sort tasks in tip prompt (#79)

- prompts.py: sort tasks overdue-first → priority desc → age desc before
  rendering into the LLM prompt (same ordering as ml/features/context.py)
- prompts.py: render User profile summary line (completion_rate, dismiss_rate,
  preferred_hour) when profile_features are present
- main.py: add profile_features field to PromptContext; plumb from
  GenerateRequest into the prompt builder via model_copy
- logging_config.py: drop add_logger_name processor (incompatible with
  PrintLoggerFactory — caused test ordering failures)
- test_generate.py: 6 new tests covering sort order, profile rendering,
  partial fields, empty profile, and end-to-end plumbing through /generate

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

ml/serving/prompts.py

@@ -23,6 +23,7 @@ class _Ctx(Protocol):
     hour_of_day: int
     day_of_week: int
     extra: dict
+    profile_features: "dict | None"
 
 
 @dataclass(frozen=True)
@@ -33,13 +34,29 @@ class Prompt:
 
 
 def _base_user_lines(ctx: "_Ctx") -> list[str]:
+    # Overdue tasks first, then high-priority, then oldest — most actionable context at top
+    tasks = sorted(
+        ctx.tasks,
+        key=lambda t: (not t.get("is_overdue", False), -t.get("priority", 1), -t.get("task_age_days", 0.0)),
+    )
     lines = [f"Time: {ctx.hour_of_day:02d}:00, day_of_week={ctx.day_of_week}"]
-    if ctx.tasks:
-        overdue = [t for t in ctx.tasks if t.get("is_overdue")]
-        lines.append(f"Tasks: {len(ctx.tasks)} total, {len(overdue)} overdue")
-        for t in ctx.tasks[:5]:
+    if tasks:
+        overdue = [t for t in tasks if t.get("is_overdue")]
+        lines.append(f"Tasks: {len(tasks)} total, {len(overdue)} overdue")
+        for t in tasks[:5]:
             due = t.get("due_date", "no due date")
             lines.append(f"  - [{t.get('priority','?')}] {t.get('content','?')} (due: {due})")
+    p = getattr(ctx, "profile_features", None) or {}
+    if p:
+        parts: list[str] = []
+        if (v := p.get("completion_rate_30d")) is not None:
+            parts.append(f"completion_rate={float(v):.0%}")
+        if (v := p.get("dismiss_rate_30d")) is not None:
+            parts.append(f"dismiss_rate={float(v):.0%}")
+        if (v := p.get("preferred_hour")) is not None:
+            parts.append(f"preferred_hour={int(v):02d}:00")
+        if parts:
+            lines.append(f"User profile: {', '.join(parts)}")
     for k, v in ctx.extra.items():
         lines.append(f"{k}: {v}")
     return lines