fix(tracing): resolve Ruff lint and format errors in governance enrichment

Remove unused imports (trace, SecurityThreatTypes, call, patch), move
logger assignment below all imports to fix E402, and apply Ruff format.

Signed-off-by: Gary Atwal <garyatwalai@users.noreply.github.com>

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

Author: garyatwalAI

examples/governance_tracing/governance_tracing_example.py

@@ -132,12 +132,8 @@ async def run_interaction(scenario: dict) -> None:
     ) as root_span:
         # --- Run guardrails (NeMo Guardrails creates its own child spans) ---
         try:
-            response = await rails.generate_async(
-                messages=[{"role": "user", "content": scenario["message"]}]
-            )
-            bot_reply = (
-                response if isinstance(response, str) else response.get("content", "")
-            )
+            response = await rails.generate_async(messages=[{"role": "user", "content": scenario["message"]}])
+            bot_reply = response if isinstance(response, str) else response.get("content", "")
             print(f"Bot reply: {bot_reply[:120]}")
         except Exception as exc:
             bot_reply = ""

nemoguardrails/tracing/governance_enricher.py

@@ -68,10 +68,7 @@
 import time
 from typing import List, Optional, Sequence
 
-logger = logging.getLogger(__name__)
-
 try:
-    from opentelemetry import trace  # type: ignore
     from opentelemetry.trace import Span  # type: ignore
 except ImportError:
     raise ImportError(
@@ -92,9 +89,10 @@
     RiskAttributes,
     SecurityAttributes,
     SecuritySeverity,
-    SecurityThreatTypes,
 )
 
+logger = logging.getLogger(__name__)
+
 # Map severity strings to a numeric weight for comparison
 _SEVERITY_ORDER = {
     SecuritySeverity.LOW: 1,
@@ -257,9 +255,7 @@ def record_security_threat(
         if detection_method is not None:
             span.set_attribute(SecurityAttributes.DETECTION_METHOD, detection_method)
         if detection_confidence is not None:
-            span.set_attribute(
-                SecurityAttributes.DETECTION_CONFIDENCE, detection_confidence
-            )
+            span.set_attribute(SecurityAttributes.DETECTION_CONFIDENCE, detection_confidence)
 
         # Detailed event for the trace waterfall
         event_attrs: dict = {
@@ -419,9 +415,7 @@ def finalise_compliance_summary(
         span.set_attribute(ComplianceAttributes.RAILS_FAILED, rails_failed)
 
         if failed_rail_names:
-            span.set_attribute(
-                ComplianceAttributes.FAILED_RAIL_NAMES, ",".join(failed_rail_names)
-            )
+            span.set_attribute(ComplianceAttributes.FAILED_RAIL_NAMES, ",".join(failed_rail_names))
 
         # Risk attributes derived from accumulated state
         risk_score = _compute_risk_score(
@@ -433,9 +427,7 @@ def finalise_compliance_summary(
         span.set_attribute(RiskAttributes.VIOLATION_COUNT, self._violation_count)
 
         if self._highest_severity is not None:
-            span.set_attribute(
-                RiskAttributes.VIOLATION_SEVERITY, self._highest_severity
-            )
+            span.set_attribute(RiskAttributes.VIOLATION_SEVERITY, self._highest_severity)
 
 
 # ---------------------------------------------------------------------------