feat: add mempool integration with execution sync and error isolation #549

Job	Run time
Detect Changes	6s
Cargo Deny (Security)	50s
Check	1m 9s
Test Suite (macos-latest, aarch64-apple-darwin, macOS ARM64)	28m 30s
Clippy	1m 11s
Test Suite (ubuntu-latest, x86_64-unknown-linux-gnu, Linux x86_64)	26m 4s
Build Release	5m 28s
Rustfmt	6s
Code Coverage	25m 44s
	1h 29m 8s

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