claude-agent-service: ship recruiter-triage agent + restore missing terragrunt.hcl

- main.tf: bump image_tag to 1b3350c0 (carries the new agent),
  init container  also copies recruiter-triage.md
  into /home/agent/.claude/agents/.
- terragrunt.hcl: restored (file was missing — apply was blocked).
  Standard root include + platform/vault/external-secrets dependencies.

Smoke-tested 2026-05-16: deep_research call on Datadog (thread 42)
via recruiter-responder REST API → 102.5s, $0.43, structured
markdown report with comp bands vs £600k floor, culture signals,
remote policy, recent news, sources cited. End-to-end Tier-2 is live.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

stacks/claude-agent-service/terragrunt.hcl

@@ -0,0 +1,18 @@
+include "root" {
+  path = find_in_parent_folders()
+}
+
+dependency "platform" {
+  config_path  = "../platform"
+  skip_outputs = true
+}
+
+dependency "vault" {
+  config_path  = "../vault"
+  skip_outputs = true
+}
+
+dependency "external-secrets" {
+  config_path  = "../external-secrets"
+  skip_outputs = true
+}