[process-manager PM-19] Compile adapters: ProcessSpec → systemd/Servy unit configs

[rickylabs]

Summary

Compile ProcessSpec graphs into systemd/Servy unit configs in the core — calls the existing renderers, never a parallel renderer (wrap-don't-reinvent).

Scope

• Archetype / area: packages/plugin-process-manager-core compile layer
• Part of Epic: NetScript Process Manager — bare-metal supervisor + admin console (pup/pm2 done right) #510
• Depends on: [process-manager PM-1] Process-graph contract v1 (ProcessGraphShape/ProcessSpecShape + state vocabulary + restart policies) #512, [process-manager PM-15] systemd renderer knobs: Type=notify, WatchdogSec, hardening, cgroups v2 #526 · Blocks: PM-20

Design source

• research/design/d1-supervision-engine-core.md (D1-S11) · plan.md §4 PM-19

Acceptance criteria

• gate: one renderer code path — compile adapters delegate to the shipped renderers (import-graph asserted)
• gate: round-trip test: graph → units → the OS layer can start/stop them (mocked adapters)
• gate: scoped check/lint/fmt wrappers green (--ext ts,tsx)

Non-scope

• Renderer feature work (PM-15).

Drift / Debt

• none