fix: correct tojson|safe usage in templates and update validator

- Remove |safe from |tojson in HTML attributes (x-data) - quotes must
  become " for browsers to parse correctly
- Update LANG-002 and LANG-003 architecture rules to document correct
  |tojson usage patterns:
  - HTML attributes: |tojson (no |safe)
  - Script blocks: |tojson|safe
- Fix validator to warn when |tojson|safe is used in x-data (breaks
  HTML attribute parsing)
- Improve code quality across services, APIs, and tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

models/database/test_run.py

@@ -5,7 +5,6 @@ Database models for tracking pytest test runs and results
 
 from sqlalchemy import (
     JSON,
-    Boolean,
     Column,
     DateTime,
     Float,
@@ -53,7 +52,9 @@ class TestRun(Base):
     pytest_args = Column(String(500))  # Command line arguments used
 
     # Status
-    status = Column(String(20), default="running", index=True)  # 'running', 'passed', 'failed', 'error'
+    status = Column(
+        String(20), default="running", index=True
+    )  # 'running', 'passed', 'failed', 'error'
 
     # Relationship to test results
     results = relationship(
@@ -77,18 +78,20 @@ class TestResult(Base):
     __tablename__ = "test_results"
 
     id = Column(Integer, primary_key=True, index=True)
-    run_id = Column(
-        Integer, ForeignKey("test_runs.id"), nullable=False, index=True
-    )
+    run_id = Column(Integer, ForeignKey("test_runs.id"), nullable=False, index=True)
 
     # Test identification
-    node_id = Column(String(500), nullable=False, index=True)  # e.g., 'tests/unit/test_foo.py::test_bar'
+    node_id = Column(
+        String(500), nullable=False, index=True
+    )  # e.g., 'tests/unit/test_foo.py::test_bar'
     test_name = Column(String(200), nullable=False)  # e.g., 'test_bar'
     test_file = Column(String(300), nullable=False)  # e.g., 'tests/unit/test_foo.py'
     test_class = Column(String(200))  # e.g., 'TestFooClass' (optional)
 
     # Result
-    outcome = Column(String(20), nullable=False, index=True)  # 'passed', 'failed', 'error', 'skipped', 'xfailed', 'xpassed'
+    outcome = Column(
+        String(20), nullable=False, index=True
+    )  # 'passed', 'failed', 'error', 'skipped', 'xfailed', 'xpassed'
     duration_seconds = Column(Float, default=0.0)
 
     # Failure details (if applicable)