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fix(security): sovereign-audit hardening pass — RCE, multi-tenant, reliability

Reasoning-based audit fixes (all verified by typecheck, attack paths re-traced):

- build-time RCE: validate spec.dependencies to npm-registry semver only
  (no git/url/file specifiers) + --ignore-scripts in runner Dockerfile.
- container hardening fail-CLOSED: harden unless RUNNER_DISABLE_HARDENING=1,
  no longer gated on a fragile NODE_ENV string compare.
- secret env keys validated (UPPER_SNAKE, reject NODE_*/PATH/LD_*).
- cross-org image-tag collision: qualify tag with serverId.
- /iterate now enforces suspension + daily-build limits like /servers.
- preview SSE: clear keepalive in finally + on client close (timer/FD leak).
- SMS OTP: atomic attempt counter (lt(attempts,MAX) in UPDATE) — brute-force race.
- getSession orders membership by createdAt (deterministic primary org).
- template scopes aggregated from real tool scopes (was hardcoded mcp:read).
- template category filter pushed into WHERE (was applied after LIMIT).
- support admin reply/status: 404 on unknown ticket; status change now audited.
- build worker: queue defaultJobOptions, docker build/run/stop timeouts,
  old-container teardown in finally (no orphan on post-deploy DB failure).
- nginx: HSTS, X-Frame-Options DENY, nosniff, Referrer-Policy.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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apps/runner-template/Dockerfile

@@ -1,7 +1,11 @@
 FROM node:20-alpine AS deps
 WORKDIR /app
 COPY package.json ./
-RUN npm install --omit=dev --no-audit --no-fund && npm install --no-save tsx@4.19.2 typescript@5.7.2
+# --ignore-scripts: generated package.json carries LLM/user-chosen dependencies.
+# Without this, a malicious dependency's postinstall lifecycle script would run
+# at `docker build` time on the shared host. Specifiers are also validated to
+# registry semver ranges at the API boundary (DependencyMap). (GEN-001)
+RUN npm install --omit=dev --ignore-scripts --no-audit --no-fund && npm install --no-save --ignore-scripts tsx@4.19.2 typescript@5.7.2
 
 FROM node:20-alpine AS runtime
 WORKDIR /app