fix: use --bare and --tools in health probe CLI check (#489)

The "Verify Claude CLI" step fails on the CI runner because Claude
Code tries to initialize keychain, LSP, plugins, and CLAUDE.md
discovery before making the API call. On a bare runner these
resources don't exist, causing exit code 1.

- Add --bare to skip all initialization and force ANTHROPIC_API_KEY auth
- Add --tools "" to disable tool definitions (health check doesn't need
  them, and this avoids sending a large payload to the gateway)

Author: andreatgretel

.github/workflows/agentic-ci-health-probe.yml

@@ -87,11 +87,13 @@ jobs:
 
           echo "Claude CLI version: $(claude --version 2>&1 || true)"
 
-          # Run a minimal prompt to verify auth + model + tool usage work end-to-end
+          # Run a minimal prompt to verify auth + model work end-to-end
           RESULT=$(claude \
+            --bare \
             --model "$MODEL" \
             -p "Reply with exactly: HEALTH_CHECK_OK" \
             --max-turns 1 \
+            --tools "" \
             --output-format text \
             2>&1) || {
               echo "::error::Claude CLI failed"