chore: remove obsolete backup directories from March 2026

- Deleted backup_20260329_183359 (block height 2222, 3 accounts, 4 transactions)
- Deleted dependency_backup_20260331_204119 (pyproject.toml, requirements files)
- Deleted pre_deployment_20260402_120429 (config examples and environment templates)

backups/pre_deployment_20260402_120549/config/security/secret-validation.yaml

@@ -1,73 +0,0 @@
-# Secret Validation Rules
-# Defines which environment variables must use secret references
-
-production_secrets:
-  coordinator:
-    required_secrets:
-      - pattern: "DATABASE_URL"
-        secret_ref: "db-credentials"
-        validation: "postgresql://"
-      
-      - pattern: "ADMIN_API_KEY"
-        secret_ref: "api-keys:admin"
-        validation: "^[a-zA-Z0-9]{32,}$"
-      
-      - pattern: "CLIENT_API_KEY"
-        secret_ref: "api-keys:client"
-        validation: "^[a-zA-Z0-9]{32,}$"
-      
-      - pattern: "ENCRYPTION_KEY"
-        secret_ref: "security-keys:encryption"
-        validation: "^[a-fA-F0-9]{64}$"
-      
-      - pattern: "HMAC_SECRET"
-        secret_ref: "security-keys:hmac"
-        validation: "^[a-fA-F0-9]{64}$"
-      
-      - pattern: "JWT_SECRET"
-        secret_ref: "security-keys:jwt"
-        validation: "^[a-fA-F0-9]{64}$"
-      
-      - pattern: "OPENAI_API_KEY"
-        secret_ref: "external-services:openai"
-        validation: "^sk-"
-      
-      - pattern: "SENTRY_DSN"
-        secret_ref: "monitoring:sentry"
-        validation: "^https://"
-
-  wallet_daemon:
-    required_secrets:
-      - pattern: "COORDINATOR_API_KEY"
-        secret_ref: "api-keys:coordinator"
-        validation: "^[a-zA-Z0-9]{32,}$"
-
-forbidden_patterns:
-  # These patterns should never appear in ANY configs
-  - "your-.*-key-here"
-  - "change-this-.*"
-  - "password="
-  - "secret_key="
-  - "api_secret="
-
-production_forbidden_patterns:
-  # These patterns should never appear in PRODUCTION configs
-  - "localhost"
-  - "127.0.0.1"
-  - "sqlite://"
-  - "debug.*true"
-
-validation_rules:
-  # Minimum security requirements
-  min_key_length: 32
-  require_complexity: true
-  no_default_values: true
-  no_localhost_in_prod: true
-  
-  # Database security
-  require_ssl_database: true
-  forbid_sqlite_in_prod: true
-  
-  # API security
-  require_https_urls: true
-  validate_api_key_format: true