fix(docs): repair 9 broken external URLs across controls and playbooks

[judeper]

Comprehensive Documentation & URL Review — Issue #38

Summary

Full scan of 625 markdown docs and 78 control files in FSI-AgentGov. Checked 972 external URLs (704 Microsoft Learn + 268 others) and all internal link references.

Findings

URLs checked:

• ✅ 704 Microsoft Learn URLs — all valid, none stale
• ✅ 259 non-Microsoft URLs — valid
• ❌ 9 broken external URLs — fixed in this PR

Broken URLs fixed:

File	Issue	Fix
deny-event-correlation-report/index.md	3 refs to renamed docs (SCHEMA.md, FLOW_SETUP.md, EVIDENCE_EXPORT.md)	Updated to current filenames (architecture.md, README.md)
3.8 Copilot Hub & Governance Dashboard	agent-access-monitor/src → 404	Changed to /scripts
3.11 Centralized Agent Inventory	agent-inventory-enforcement-monitor → 404	Changed to agent-registry-automation
2.22 troubleshooting playbook	SOLUTION-DOCUMENTATION.md → 404	Changed to README.md
1.8 verification-testing playbook	NY DFS cyber_faqs → 404	Changed to cybersecurity
1.23 Step-up Authentication	CSRC old search URL → redirect to generic page	Updated to new CPRT catalog URL with element anchor
2.8 Access Control & SoD	CSRC old search URL → redirect to generic page	Updated to new CPRT catalog URL with element anchor

Other validations — all passing:

• ✅ mkdocs build --strict — zero errors/warnings
• ✅ verify_controls.py — all 78 controls have required 10-section structure
• ✅ verify_language_rules.py — no prohibited FSI language found
• ✅ All control footers at v1.6.2
• ✅ No stale docs.microsoft.com references (all already learn.microsoft.com)
• ✅ Regulatory references (OCC, FINRA, SEC, NIST) current and correctly cited

What was NOT changed

• No content rewrites (only URL fixes)
• No structural changes to controls
• No navigation changes

Closes judeper/OceanSquad#38