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_local.yaml

@@ -0,0 +1,68 @@
+description: Enhanced genesis for AITBC with new features
+genesis:
+  chain_id: "aitbc-enhanced-devnet"
+  chain_type: "topic"
+  purpose: "development-with-new-features"
+  name: "AITBC Enhanced Development Network"
+  description: "Enhanced development network with AI trading, surveillance, analytics, and multi-chain features"
+  timestamp: "2026-03-07T11:15:00Z"
+  parent_hash: "0x0000000000000000000000000000000000000000000000000000000000000000"
+  gas_limit: 15000000
+  gas_price: 1000000000
+  consensus:
+    algorithm: "poa"
+    validators:
+      - "ait1devproposer000000000000000000000000000000"
+      - "ait1aivalidator00000000000000000000000000000"
+      - "ait1surveillance0000000000000000000000000000"
+  accounts:
+    - address: "aitbc1genesis"
+      balance: "10000000"
+      type: "genesis"
+    - address: "aitbc1faucet"
+      balance: "1000000"
+      type: "faucet"
+    - address: "aitbc1aiengine"
+      balance: "2000000"
+      type: "service"
+    - address: "aitbc1surveillance"
+      balance: "1500000"
+      type: "service"
+    - address: "aitbc1analytics"
+      balance: "1000000"
+      type: "service"
+    - address: "aitbc1marketplace"
+      balance: "2000000"
+      type: "service"
+    - address: "aitbc1enterprise"
+      balance: "3000000"
+      type: "service"
+  parameters:
+    block_time: 3
+    max_block_size: 2097152
+    min_stake: 1000
+    block_reward: "2000000000000000000"
+  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
+    ai_surveillance:
+      port: 8011
+      enabled: true
+    advanced_analytics:
+      port: 8012
+      enabled: true
+    enterprise_gateway:
+      port: 8013
+      enabled: true