feat: OPE46-00042: QoL: Add machine alias support

[andrei-hasna]

Objective

OPE46-00042: QoL: Add machine alias support

Add alias support in config: allow defining shortcuts like prod -> production-server-01 in config.json for quick access.

MEASURED on origin/main: src/config.ts contains no alias concept. Add an optional aliases map to the config schema so prod resolves to production-server-01, and resolve aliases in ONE place (the machine-id resolution helper) so every command that accepts a machine id benefits. Unknown alias must produce a clear error, not a silent fallthrough to a literal machine id.

EXECUTION NOTES (added 2026-07-29 for autonomous execution)
Repo: github.com/hasna/monitor. CLI commands are registered in src/cli/index.ts (Commander). Verified against origin/main that this surface does NOT already exist.
Requirements: implement in src/ (not docs); keep existing output shapes and the -j/--json contract intact; reuse the existing helpers in that file (parseLimitOption, parseCursorOption, chalk formatting) rather than inventing new patterns.
Acceptance: bun run typecheck, bun run build and bun test are all green, and a new/extended test under src/ exercises the new behaviour (assert on the command's JSON output and/or exit code, not on colored text). No network, no live remote machines, no credentials — tests must run offline against local collectors/fixtures.

Verification

• policy source: base c4cbd1e (immutable commit — agent-proof)
• ⚠️ GATE-INTEGRITY: agent touched verify-bearing config — REVIEW (scripts.typecheck)
• containment: env — allowlist env, non-login shell, run-scoped HOME (registry auth seeded for install)
• install: pass
• typecheck: pass
• lint: pass
• build: pass
• test: pass
• doctor (ci): ok — 11 checks passed (1 advisory)

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Run run_c51ff509d0e7 · backend codewith · task 679914cb-4b44-4f62-b466-396ef5a60ddc
🏭 Generated by @hasnaxyz/factory

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