Feat Implement connection functionality between ICP Context and Proxy contracts

[alenmestrov]

Context-Proxy Contract Integration

Summary

This PR implements the integration between context and proxy contracts, enabling secure deployment and member verification for multi-signature management.

Key Features

• Automated proxy contract deployment through context contract
  • Context contract stores and manages proxy WASM
  • Deploys new proxy instance for each context
  • Initializes proxy with correct context ID and parent context canister ID
• Member verification system
  • Proxy contract verifies all operations with parent context
  • Checks if users are members before allowing proposal creation/approval
  • Secure cross-canister calls for verification

Changes

Context Contract Updates

• Added proxy WASM storage and management
• Implemented set_proxy_code for updating proxy contract code
• Added proxy deployment logic during context creation
• Member verification endpoint for proxy contracts

Proxy Contract Updates

• Added context contract integration
• Implemented member verification before proposal operations
• Secure initialization with context parameters

Integration Tests

Added comprehensive test suite covering:

• Proxy deployment through context contract
• Member verification flow
• Proposal creation and approval by verified members
• Error cases for non-members

Build and Test Instructions

Standard build and test process:

./build.sh
cargo test --test integration -- --nocapture

Notes

• Proxy contracts are now fully integrated with their parent context
• All operations verify membership status
• Secure deployment ensures correct initialization