feat(identity): Add new verification lifecycle events to IIdentityManagerV2

[Neros0]

Description

This PR expands the IIdentityManagerV2 interface with three new events designed to improve observability and automation across verification workflows. These events enable off-chain services, indexers, or governance modules to react to identity state transitions in real time.

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✅ Added Events

Event	Purpose	Parameters
UserTypeUpdated	Emitted when a user’s classification changes (e.g. Regular → Admin → KYC’d, etc.)	user, oldType, newType
VerificationRenewed	Fired when a user successfully extends or refreshes their verification credentials	user, newExpirationTimestamp
BatchVerificationCompleted	Signals completion of mass verification / admin approval actions	admin, count, userType

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🧠 Why This Matters

These additions make the contract fully indexer-friendly, allowing:

• 🪝 Automated role syncing (e.g. Discord/Telegram bot hooks)
• 📊 Analytics and compliance tracking
• 🔄 Event-driven renewal reminders or governance incentives

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📜 Code Changes (Minimal & Non-Breaking)

 interface IIdentityManagerV2 {
   ...
   event UserVerificationRevoked(address indexed user, address indexed revoker, string reason);
+  event UserTypeUpdated(address indexed user, UserType oldType, UserType newType);
+  event VerificationRenewed(address indexed user, uint256 newExpirationTimestamp);
+  event BatchVerificationCompleted(address indexed admin, uint256 count, UserType userType);
 }