fix: use parseAsync() in CLI to prevent Bun hang

program.parse() doesn't await async action handlers. Node's event loop
handles this by accident, but Bun's stricter loop hangs indefinitely.
Switching to program.parseAsync() fixes vault-cli integration tests
under Bun.

Author: flyingrobots

CHANGELOG.md

@@ -41,6 +41,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - CLI version string updated from `2.0.0` to `3.0.0`.
 - CLI `vault history --max-count` now validates input as a positive integer.
 - Stale JSDoc in `GitPersistenceAdapter` corrected (removed mention of retries).
+- CLI uses `program.parseAsync()` instead of `program.parse()` to prevent Bun from hanging on async action handlers.
 
 ### Changed
 - **Vault promoted to domain layer** — all vault logic extracted from facade (`index.js`) into `VaultService` (`src/domain/services/VaultService.js`) with `GitRefPort`/`GitRefAdapter` for ref operations. Facade now delegates to VaultService.

bin/git-cas.js

@@ -299,4 +299,4 @@ vault
     }
   });
 
-program.parse();
+await program.parseAsync();