docs: add documentation for ILabRegistry.sol

docs/ILabRegistry.md

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+## Overview
+The `ILabRegistry` interface defines a comprehensive system for managing and tracking research laboratory entities on the ChunkNet blockchain. It provides mechanisms for registering, updating, and managing lab metadata, researchers, and lifecycle states.
+
+## Interface
+
+| Function | Visibility | Description | Parameters | Returns |
+|----------|------------|-------------|------------|---------|
+| `registerLab` | External | Register a new lab | `name`, `description`, `metadataHash` | `labId` |
+| `updateLabDetails` | External | Update existing lab metadata | `labId`, `newName`, `newDescription`, `newMetadataHash` | - |
+| `addResearcher` | External | Add authorized researcher | `labId`, `researcherAddress` | - |
+| `removeResearcher` | External | Remove authorized researcher | `labId`, `researcherAddress` | - |
+| `getLab` | External View | Retrieve lab details | `labId` | `LabEntity` |
+| `isAuthorizedResearcher` | External View | Check researcher authorization | `labId`, `researcherAddress` | `bool` |
+| `deactivateLab` | External | Disable lab modifications | `labId` | - |
+
+## Events
+- `LabRegistered`: Triggered when a new lab is registered
+- `LabUpdated`: Emitted when lab details are modified
+
+## Storage Layout
+- `LabEntity` struct contains:
+  - `owner`: Lab owner's address
+  - `name`: Lab name
+  - `description`: Lab description
+  - `metadataHash`: Content/IPFS hash
+  - `registrationTimestamp`: Creation timestamp
+  - `isActive`: Current lab status
+  - `authorizedResearchers`: List of permitted researchers
+
+## Access Control
+- Lab registration requires unique naming
+- Only lab owners can modify lab details
+- Researcher addition/removal restricted to lab owner
+- Deactivation prevents further modifications
+
+## Security Considerations
+- Use input validation for lab names and descriptions
+- Implement access control checks in implementation
+- Consider rate limiting for registration
+- Validate researcher addresses
+- Use cryptographic hashing for metadata integrity
+
+## Deployment
+- **RPC URL**: https://rpc.chunknet.org
+- **Chain ID**: 214562
+- **Recommended Deployment Steps**:
+  1. Compile with Solidity 0.8.19
+  2. Use ChunkNet deployment scripts
+  3. Set initial owner/admin
+  4. Verify contract on explorer
+
+## Testing
+- Unit test lab registration workflow
+- Test researcher authorization mechanisms
+- Validate metadata update restrictions
+- Check deactivation behavior
+- Perform boundary testing on input parameters
+- Simulate edge cases in researcher management