refactor: rename generic metadata fields to specific names in multitenant models

- Rename metadata to user_metadata in TenantUser model
- Rename metadata to usage_metadata in UsageRecord model
- Rename metadata to invoice_metadata in Invoice model
- Rename metadata to event_metadata in TenantAuditLog model
- Update TenantManagementService to use event_metadata parameter name

genesis_enhanced_template.yaml

@@ -0,0 +1,85 @@
+description: Enhanced genesis template for AITBC with new features
+genesis:
+  accounts:
+    - address: "aitbc1genesis"
+      balance: "10000000"
+    - address: "aitbc1faucet"
+      balance: "1000000"
+  chain_type: topic
+  consensus:
+    algorithm: poa
+    authorities:
+      - "ait1devproposer000000000000000000000000000000"
+      - "ait1aivalidator00000000000000000000000000000"
+      - "ait1surveillance0000000000000000000000000000"
+    block_time: 3
+    max_validators: 100
+  contracts: []
+  description: Enhanced development network with AI trading, surveillance, analytics, and multi-chain features
+  name: AITBC Enhanced Development Network
+  parameters:
+    block_reward: '2000000000000000000'
+    max_block_size: 2097152
+    max_gas_per_block: 15000000
+    min_gas_price: 1000000000
+    min_stake: 1000
+    governance_threshold: "0.51"
+    surveillance_threshold: "0.75"
+    cross_chain_fee: "10000000000000000"
+  privacy:
+    access_control: permissioned
+    require_invitation: false
+    visibility: public
+    encryption: "enabled"
+    zk_proofs: "enabled"
+    audit_logging: "enabled"
+  purpose: development-with-new-features
+  features:
+    ai_trading_engine: true
+    ai_surveillance: true
+    advanced_analytics: true
+    enterprise_integration: true
+    multi_modal_ai: true
+    zk_proofs: true
+    cross_chain_bridge: true
+    global_marketplace: true
+    adaptive_learning: true
+    performance_monitoring: true
+  services:
+    ai_trading_engine:
+      port: 8010
+      enabled: true
+      config:
+        models: ["mean_reversion", "momentum", "arbitrage"]
+        risk_threshold: 0.02
+        max_positions: 100
+    ai_surveillance:
+      port: 8011
+      enabled: true
+      config:
+        risk_models: ["isolation_forest", "neural_network"]
+        alert_threshold: 0.85
+        retention_days: 30
+    advanced_analytics:
+      port: 8012
+      enabled: true
+      config:
+        indicators: ["rsi", "macd", "bollinger", "volume"]
+        update_interval: 60
+        history_retention: 86400
+    enterprise_gateway:
+      port: 8013
+      enabled: true
+      config:
+        max_tenants: 1000
+        rate_limit: 1000
+        auth_required: true
+  economics:
+    total_supply: "21000000000000000000000000"
+    inflation_rate: "0.02"
+    burn_rate: "0.01"
+    treasury_allocation: "0.20"
+    staking_allocation: "0.30"
+    ecosystem_allocation: "0.25"
+    team_allocation: "0.15"
+    community_allocation: "0.10"