refactor(scoring): persist weights in DB table, replace mutable Settings with scoring_config_service

backend/app/models/__init__.py

@@ -19,6 +19,7 @@ from app.models.coverage_snapshot import CoverageSnapshot, SnapshotTechniqueStat
 from app.models.jira_link import JiraLink, JiraLinkEntityType, JiraSyncDirection
 from app.models.worklog import Worklog
 from app.models.osint_item import OsintItem
+from app.models.scoring_config import ScoringConfig
 from app.models.enums import TechniqueStatus, TestState, TestResult, TeamSide
 
 __all__ = [
@@ -31,6 +32,6 @@ __all__ = [
     "ComplianceFramework", "ComplianceControl", "ComplianceControlMapping",
     "CoverageSnapshot", "SnapshotTechniqueState",
     "JiraLink", "JiraLinkEntityType", "JiraSyncDirection",
-    "Worklog", "OsintItem",
+    "Worklog", "OsintItem", "ScoringConfig",
     "TechniqueStatus", "TestState", "TestResult", "TeamSide",
 ]

backend/app/models/scoring_config.py

@@ -0,0 +1,24 @@
+"""ScoringConfig — single-row table for persisted scoring weights.
+
+Replaces the mutable-settings approach where PATCH /scores/config
+mutated the in-process ``Settings`` object (lost on restart).
+"""
+
+import uuid
+
+from sqlalchemy import Column, Float, DateTime, func
+from sqlalchemy.dialects.postgresql import UUID
+
+from app.database import Base
+
+
+class ScoringConfig(Base):
+    __tablename__ = "scoring_config"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    weight_tests = Column(Float, nullable=False, default=40.0)
+    weight_detection_rules = Column(Float, nullable=False, default=20.0)
+    weight_d3fend = Column(Float, nullable=False, default=15.0)
+    weight_freshness = Column(Float, nullable=False, default=15.0)
+    weight_platform_diversity = Column(Float, nullable=False, default=10.0)
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())