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

backend/migrations/versions/e2f9c6b4a1d3_make_approval_confidence_float.py

@@ -0,0 +1,39 @@
+"""make approval confidence float
+
+Revision ID: e2f9c6b4a1d3
+Revises: d8c1e5a4f7b2
+Create Date: 2026-02-12 20:00:00.000000
+
+"""
+
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "e2f9c6b4a1d3"
+down_revision = "d8c1e5a4f7b2"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.alter_column(
+        "approvals",
+        "confidence",
+        existing_type=sa.Integer(),
+        type_=sa.Float(),
+        existing_nullable=False,
+    )
+
+
+def downgrade() -> None:
+    op.alter_column(
+        "approvals",
+        "confidence",
+        existing_type=sa.Float(),
+        type_=sa.Integer(),
+        existing_nullable=False,
+    )