* fix: Handle relayed SIGINT gracefully in withProcessCancellation
Changes `process.once` to `process.on` for SIGINT in `DirectAnalysis.ts`.
When REA is launched via npx, a single process-group SIGINT triggers two
SIGINT events (one direct, one relayed). Previously, the first event would
consume the handler and the second would abruptly terminate the Node process,
abandoning Ghidra resource cleanup.
This change ensures subsequent SIGINTs idempotently request cancellation
without crashing the process, matching the behaviour of `withCommandCancellation`.
* fix(cli): keep termination guards through provider cleanup
* test(cli): exercise repeated analysis signals on macOS
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Co-authored-by: N0zoM1z0 <1705004398@qq.com>
Sravan Avvaru