Restore process dump synchronization warnings

[Victor-Su-Ortiz]

Summary

Fixes #6028. Re-enable the saved/running process-list warning in pm2 ls. Compare names without depending on order and account for repeated process names, including equal-sized lists with different multiplicities. Ignore PM2 modules.

Add seven focused cases in an owned temporary PM2 home and register them in the unit runner.

Verification

• The new regression fails on the original production code and passes after the fix: seven cases passed.
• Existing test/programmatic/dump.mocha.js: six passed in an isolated short temporary PM2 home.
• Real CLI flow passed: save A → synchronized; start B → warning; save A+B → synchronized; delete A → warning. The test daemon was stopped afterward.
• Node syntax checks and git diff --check passed.

The model's sandboxed daemon tests timed out; the independent reviewer reran them successfully outside that sandbox with isolated state. The full e2e suite was not run because some scripts hardcode the user's default PM2 home. This repository defines neither an npm lint nor a typecheck script.

AI assistance

Implementation and tests generated with OpenCode opencode/space-bunny-free (Space Bunny). Codex independently reviewed and ran the checks and requested isolation and duplicate-name test corrections. No human code review has occurred. Submitted as a draft for maintainer review.

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