WP-0001: feedback channels, CI, pre-commit, telemetry docs

Add kaizen-agentic feedback CLI, Gitea issue templates, CI workflow,
pre-commit hooks, FEEDBACK/TELEMETRY docs, and cross-platform path tests.
Improve CLI registry error messages; remove agents_backup scaffolding.
Apply black formatting across src/tests for CI consistency.

State Hub message sent to agentic-resources for Helix correlation doc link.

src/kaizen_agentic/metrics.py

@@ -8,7 +8,6 @@ from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from typing import Any, Dict, List, Optional
 
-
 DEFAULT_RETENTION_DAYS = 180
 
 
@@ -170,7 +169,9 @@ class MetricsStore:
         recent_success = [1.0 if s else 0.0 for s in successes[-window:]]
         prior_success = [1.0 if s else 0.0 for s in successes[:-window][-window:]]
         recent_quality = quality_scores[-window:]
-        prior_quality = quality_scores[:-window][-window:] if len(quality_scores) > window else []
+        prior_quality = (
+            quality_scores[:-window][-window:] if len(quality_scores) > window else []
+        )
 
         return {
             "agent": self.agent_name,
@@ -274,4 +275,4 @@ class OptimizerStore:
         }
         with self.recommendations_path.open("a", encoding="utf-8") as handle:
             handle.write(json.dumps(entry, sort_keys=True))
-            handle.write("\n")
+            handle.write("\n")