feat(vm): add capability-aware async execution and lifecycle consumption

[fffonion]

Summary

• bind capability profiles to host imports and builtin execution
• add generic async host execution and bridge acknowledgement semantics
• integrate generic operation consumption with invocation, run, reset, shutdown, and VM pooling
• enforce transactional admission, cancellation, quiescence, and exactly-once terminal cleanup

Stack

• Base: refactor(host): migrate IO and SQLite onto scoped lifecycle #18
• Next: feat(compiler): add resource typing, ownership, VMBC and LSP integration #24
• Commits: 89df781, e28c6d8

Validation

• capability and async-host suites
• invocation/run/reset/pool lifecycle suites
• bridge rollback and cancellation stress coverage
• workspace all-features tests and strict Clippy