feat(approvals): enhance approval model with task titles and confidence as float

backend/app/services/board_snapshot.py

@@ -36,10 +36,21 @@ def _memory_to_read(memory: BoardMemory) -> BoardMemoryRead:
     return BoardMemoryRead.model_validate(memory, from_attributes=True)
 
 
-def _approval_to_read(approval: Approval, *, task_ids: list[UUID]) -> ApprovalRead:
+def _approval_to_read(
+    approval: Approval,
+    *,
+    task_ids: list[UUID],
+    task_titles: list[str],
+) -> ApprovalRead:
     model = ApprovalRead.model_validate(approval, from_attributes=True)
     primary_task_id = task_ids[0] if task_ids else None
-    return model.model_copy(update={"task_id": primary_task_id, "task_ids": task_ids})
+    return model.model_copy(
+        update={
+            "task_id": primary_task_id,
+            "task_ids": task_ids,
+            "task_titles": task_titles,
+        },
+    )
 
 
 def _task_to_card(
@@ -137,13 +148,21 @@ async def build_board_snapshot(session: AsyncSession, board: Board) -> BoardSnap
         session,
         approval_ids=approval_ids,
     )
+    task_title_by_id = {task.id: task.title for task in tasks}
     approval_reads = [
         _approval_to_read(
             approval,
-            task_ids=task_ids_by_approval.get(
-                approval.id,
-                [approval.task_id] if approval.task_id is not None else [],
+            task_ids=(
+                linked_task_ids := task_ids_by_approval.get(
+                    approval.id,
+                    [approval.task_id] if approval.task_id is not None else [],
+                )
             ),
+            task_titles=[
+                task_title_by_id[task_id]
+                for task_id in linked_task_ids
+                if task_id in task_title_by_id
+            ],
         )
         for approval in approvals
     ]

backend/app/services/lead_policy.py

@@ -5,16 +5,16 @@ from __future__ import annotations
 import hashlib
 from typing import Mapping
 
-CONFIDENCE_THRESHOLD = 80
+CONFIDENCE_THRESHOLD = 80.0
 MIN_PLANNING_SIGNALS = 2
 
 
-def compute_confidence(rubric_scores: Mapping[str, int]) -> int:
+def compute_confidence(rubric_scores: Mapping[str, int]) -> float:
     """Compute aggregate confidence from rubric score components."""
-    return int(sum(rubric_scores.values()))
+    return float(sum(rubric_scores.values()))
 
 
-def approval_required(*, confidence: int, is_external: bool, is_risky: bool) -> bool:
+def approval_required(*, confidence: float, is_external: bool, is_risky: bool) -> bool:
     """Return whether an action must go through explicit approval."""
     return is_external or is_risky or confidence < CONFIDENCE_THRESHOLD