fix: add incomplete_tests feature to Cargo.toml for test cfg checks

Properly fixes the unexpected cfg warning by declaring the incomplete_tests
feature flag that multiple test files reference.

## Changes
- Added `incomplete_tests = []` to [features] section in Cargo.toml
- Removed temporary `#![allow(unexpected_cfgs)]` workaround from lib.rs
- Feature flag allows test files to use `#[cfg(feature = "incomplete_tests")]`
  to conditionally exclude unfinished tests without warnings

## Impact
- ✅ Resolves unexpected cfg warnings for 18 test files
- ✅ Tests can now use `--features incomplete_tests` to enable experimental tests
- ✅ CI builds pass without cfg warnings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: 0xrinegade

Cargo.toml

@@ -107,6 +107,7 @@ proptest = "1.5.0"
 [features]
 default = []
 remote-wallet = ["solana-remote-wallet"]
+incomplete_tests = []  # Feature flag for incomplete/experimental test files
 
 [[bin]]
 name = "osvm-bootstrap"

src/lib.rs

@@ -21,7 +21,6 @@
 // Allow clippy warnings for this codebase since it's under active development
 #![allow(clippy::all)]
 #![allow(unused)]
-#![allow(unexpected_cfgs)]
 
 pub mod clparse;
 pub mod commands;