fix(tholos): prevent initialize front-running via atomic constructor

[s6pa1rta3n-lab]

Summary of Changes

Fixes #158 by adding an atomic __constructor to Tholos (v1) mirroring TholosV2::__constructor.

Key Improvements

• Atomic Deployment & Initialization: Added Tholos::__constructor which executes Self::initialize synchronously during contract instantiation.
• Front-Running Prevention: Eliminates the window where an uninitialized contract could be front-run by a third-party caller attempting to initialize with malicious parameters or take administrative control.
• Preserved Idempotency Guard: Secondary attempts to invoke initialize after deployment fail with Error::AlreadyInitialized.
• Comprehensive Unit and Property Tests: Updated test suite to instantiate contracts via constructor and added explicit verification that subsequent initialize calls fail.

Verification

• cargo test -p tholos: 70/70 tests passing (including fuzzed proptests).
• cargo test -p tholos-v2: 107/107 tests passing.
• cargo clippy -p tholos --all-targets -- -D warnings: Clean.
• cargo fmt --check: Clean.

Payout Routing

• EVM (Base/Arbitrum/Polygon/ETH): 0xF46C9F6d70C50BF81ef3588AB523a90a594a2F89
• Stellar: GCL6OXAMLD75BMTINA6EMRUDWK5THQUSHMYNLSNBCJAPZJHNYJTUNIBC

[collinsezedike]

@s6pa1rta3n-lab Closing. #158 has no assignee. Comment on the issue and wait to be assigned before opening a PR.