fix(10632): address PR review blocking issues

Resolved three blocking review items from pr-review-worker:

1. Added @tdd_issue tag at Feature level to fix unit_tests CI failure
   (each scenario has @tdd_issue_7161 which requires @tdd_issue present)

2. Assigned milestone v3.6.0 to align with linked issue #7161

3. Applied ruff format to resolve lint/format violations in discovery.py

features/lsp_discovery_dos_protection.feature

@@ -1,4 +1,6 @@
 Feature: LSP language discovery DoS protection
+  @tdd_issue
+  @tdd_issue_7161
   Prevent resource exhaustion attacks via directory traversal limits.
   Issue #7161: Resource exhaustion DoS in LSP language discovery.
 

src/cleveragents/lsp/discovery.py

@@ -257,7 +257,7 @@ class LanguageDiscovery:
                     break
 
                 # Calculate current depth
-                depth = root[len(directory):].count(os.sep)
+                depth = root[len(directory) :].count(os.sep)
                 if depth > max_depth:
                     logger.warning(
                         "lsp.discovery.max_depth_exceeded",