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/registry.py

@@ -135,7 +135,10 @@ class AgentDefinition:
             return AgentCategory.META
 
         # Infrastructure agents
-        if any(keyword in name_lower for keyword in ["setup", "repository", "tooling", "sys-medic", "medic"]):
+        if any(
+            keyword in name_lower
+            for keyword in ["setup", "repository", "tooling", "sys-medic", "medic"]
+        ):
             return AgentCategory.INFRASTRUCTURE
 
         # Development process agents