feat: add SQLCipher database encryption support and consolidate agent documentation

- Add SQLCipher encryption for ait-mainnet database with configurable flag
- Add db_encryption_enabled and db_encryption_key_path config settings
- Implement encryption key loading and PRAGMA key setup via connection events
- Add shutdown_db function for proper database cleanup
- Export middleware classes in aitbc/__init__.py
- Fix import path in sync.py for settings
- Remove duplicate agent documentation from docs

docs/workflows/README.md

@@ -7,6 +7,7 @@
 **Version**: 1.0
 
 ## 🧭 **Navigation Path:**
+
 **🏠 [Documentation Home](../README.md)** → **🔄 Workflows** → *You are here*
 
 **breadcrumb**: Home → Workflows → Overview
@@ -14,24 +15,33 @@
 ---
 
 ## 🎯 **See Also:**
-- **📚 [About Documentation](../about/README.md)** - Documentation standards and remediation notes
-- **🏠 [Documentation Home](../README.md)** - Main docs entry point
-- **🧭 [Master Index](../MASTER_INDEX.md)** - Full documentation catalog
-- **✅ [Compliance Audit](../about/DOCUMENTATION_COMPLIANCE_AUDIT.md)** - Checklist for docs drift
+
+- **📚 [About Documentation](../about/README.md)** -
+  Documentation standards and remediation notes
+- **🏠 [Documentation Home](../README.md)** - Main docs entry
+  point
+- **🧭 [Master Index](../MASTER_INDEX.md)** - Full documentation
+  catalog
+- **✅ [Compliance Audit](../about/DOCUMENTATION_COMPLIANCE_AUDIT.md)** -
+  Checklist for docs drift
 
 ---
 
 ## 📦 **Contents**
 
-- **[DOCS_WORKFLOW_COMPLETION_SUMMARY.md](DOCS_WORKFLOW_COMPLETION_SUMMARY.md)** - Documentation workflow completion summary
-- **[DOCS_WORKFLOW_COMPLETION_SUMMARY_20260303.md](DOCS_WORKFLOW_COMPLETION_SUMMARY_20260303.md)** - Earlier workflow completion summary
-- **[documentation-updates-completed.md](documentation-updates-completed.md)** - Documentation update completion record
+- **[DOCS_WORKFLOW_COMPLETION_SUMMARY.md](DOCS_WORKFLOW_COMPLETION_SUMMARY.md)** -
+  Documentation workflow completion summary
+- **[DOCS_WORKFLOW_COMPLETION_SUMMARY_20260303.md](DOCS_WORKFLOW_COMPLETION_SUMMARY_20260303.md)** -
+  Earlier workflow completion summary
+- **[documentation-updates-completed.md](documentation-updates-completed.md)** -
+  Documentation update completion record
 
 ---
 
 ## 🧱 **Purpose**
 
-This directory tracks documentation workflow outcomes, especially when a docs remediation or content update has been completed.
+This directory tracks documentation workflow outcomes, especially when a
+  docs remediation or content update has been completed.
 
 ---