Apply Composer changes: comprehensive API updates, migrations, middleware, and infrastructure improvements

- Add comprehensive database migrations (001-024) for schema evolution
- Enhance API schema with expanded type definitions and resolvers
- Add new middleware: audit logging, rate limiting, MFA enforcement, security, tenant auth
- Implement new services: AI optimization, billing, blockchain, compliance, marketplace
- Add adapter layer for cloud integrations (Cloudflare, Kubernetes, Proxmox, storage)
- Update Crossplane provider with enhanced VM management capabilities
- Add comprehensive test suite for API endpoints and services
- Update frontend components with improved GraphQL subscriptions and real-time updates
- Enhance security configurations and headers (CSP, CORS, etc.)
- Update documentation and configuration files
- Add new CI/CD workflows and validation scripts
- Implement design system improvements and UI enhancements

.gitattributes

@@ -0,0 +1,32 @@
+# Git attributes for DoD/MilSpec compliance
+# Ensures proper handling of sensitive files
+
+# Prevent diffing of binary files that might contain secrets
+*.key binary
+*.pem binary
+*.p12 binary
+*.pfx binary
+*.crt binary
+*.cert binary
+*.p7b binary
+*.p7c binary
+*.p7m binary
+*.p7s binary
+
+# Prevent merging of configuration files with secrets
+*.env merge=ours
+*.secret merge=ours
+*credentials*.yaml merge=ours
+*secret*.yaml merge=ours
+
+# Mark sensitive files for git-secrets
+*.env filter=git-secrets
+*.secret filter=git-secrets
+*credentials*.yaml filter=git-secrets
+*secret*.yaml filter=git-secrets
+
+# Prevent auto-conversion of line endings for sensitive files
+*.key text eol=lf
+*.pem text eol=lf
+*.env text eol=lf
+