feat: confluence benchmark, pattern extractor, agent KB, UX spec

- extract-patterns.js: mines layered arch, ArgoCD appsets, cloud regions,
  CIDR allocations, naming conventions, sync waves, tech stack from code
- agent-kb.js: token-efficient JSON rendering of same doc tree
- eval-confluence-ref-questions.json: 32 reference-only benchmark questions
- wiggum-v2.sh: Ralph Wiggum loop targeting confluence baseline (77.8%)
- docs/human-ux-spec.md: BMad UX designer spec for human doc structure
- Eval results: V2 at 28.7% vs confluence 77.8% baseline
- Hub/spoke ownership now correctly extracted (95% on that question)
- Naming conventions, regions, CIDRs surfaced in system-architecture.md

foxtrot-docs-v3/reference/subsystems/app-common.md

@@ -0,0 +1,38 @@
+# Subsystem: app-common
+
+**Kind:** domain
+**Files:** 934
+**Functions:** 28, **Classes:** 0
+
+## Dependencies
+### Depends On
+- → app-tools: 1 calls, 0 imports
+
+## Public Exports
+- `add_bucket_policy`
+- `add_destination_to_lambda_function`
+- `add_resource_based_policy_to_lambda_function`
+- `check_certificate_exists`
+- `create_lambda_function`
+- `create_or_get_gateway`
+- `delete_lambda_function`
+- `ensure_s3_bucket_exists`
+- `find_app_namespaces`
+- `find_application_jar`
+- `generate_certificate`
+- `generate_placeholder_certificate`
+- `get_aws_account_id`
+- `get_cloud_config`
+- `handle_error`
+- `load_compute_config`
+- `load_kong_config`
+- `log_error`
+- `log_info`
+- `main`
+- `make_request`
+- `read_file_content`
+- `update_bucket_notification_configuration`
+- `upload_certificate`
+- `upload_properties_files`
+- `with_delay`
+- `write_file_content`