fix(grok): unbreak workspace-cwd agents, free trapped agents, stop self-PR review

Three bugs surfaced by the first live Grok lifecycle run:

- Dev/QA/doc agents crash-looped at startup with ModuleNotFoundError on
  roboco.llm.providers. The entrypoint ran the opencode-config render from the
  agent's workspace-clone cwd, whose own roboco/ dir shadows /app on the
  sys.path front; a branch without the grok code lacks the providers package.
  Render from /app so the installed package always resolves (the render has no
  cwd dependency — writes global, reads ROBOCO_MCP_CONFIG).

- A budget/loop halt blocked EVERY tool, including i_am_idle, unclaim, and
  i_am_blocked, so a halted agent could neither continue nor stop and flailed —
  one billed model turn per blocked retry. The before-gate now always lets the
  release verbs through so a halted agent can exit cleanly.

- The inbound reviewer ingested the org's OWN PRs (authored by the repo-owner
  account), which can't take a REQUEST_CHANGES review (GitHub 422) and get
  re-reviewed every poll. The normalizer flags author_is_owner and ingestion
  skips them — the reviewer reviews only PRs the org did not author.
  External/contributor PRs are unaffected.

Tests: owner-authored PR flagged + skipped; normalize shape covers the new
field. Gate green on the changed modules (ruff/mypy/xenon + 48 tests).

docker/grok/budget-feed.js

@@ -81,12 +81,21 @@ function bareVerb(tool) {
   return tool;
 }
 
+// Release/escape verbs must ALWAYS be allowed through the before-gate. A halt
+// (budget, loop, or fail-closed) that also blocks these traps the agent: it can
+// neither continue nor stop, so it flails — and every blocked retry is another
+// billed model turn. Letting i_am_idle / unclaim / i_am_blocked through is the
+// only way a halted agent can exit cleanly.
+const RELEASE_VERBS = new Set(["i_am_idle", "unclaim", "i_am_blocked"]);
+
 // Named export (opencode's plugin convention) + baked into the plugin
 // auto-discovery dir (~/.config/opencode/plugin/) at image build — the simplest
 // registration route (no config `plugin:` path needed).
 export const RobocoBudgetFeed = async () => {
   return {
     "tool.execute.before": async (input) => {
+      // Escape hatches always pass — a halted agent must be able to stop.
+      if (RELEASE_VERBS.has(bareVerb(String(input?.tool || "")))) return;
       const status = await sdk("GET", "/budget/status", null);
       if (!status) {
         // One-shot delivery agents MUST have the in-container SDK budget server