Add Claude observability tracing and diagnostics UI

.env.example

@@ -16,6 +16,15 @@ CLAUDE_CODE_OAUTH_TOKEN=
 ANTHROPIC_API_KEY=
 CLAUDE_MODEL=
 CLAUDE_CODE_PATH=
+# Claude binary observability: off | stdout | file | both
+CLAUDE_OBSERVABILITY_MODE=off
+# CLAUDE_OBSERVABILITY_VERBOSITY: summary | full
+CLAUDE_OBSERVABILITY_VERBOSITY=summary
+# Relative to repository workspace root in UI/provider runs.
+CLAUDE_OBSERVABILITY_LOG_PATH=.ai_ops/events/claude-trace.ndjson
+CLAUDE_OBSERVABILITY_INCLUDE_PARTIAL=false
+CLAUDE_OBSERVABILITY_DEBUG=false
+CLAUDE_OBSERVABILITY_DEBUG_LOG_PATH=
 
 # Agent management limits
 AGENT_MAX_CONCURRENT=4