fix(process): name the Swift compile deadline (#6071)

Name REA_SWIFTC_COMPILE_TIMEOUT_MS, its effective milliseconds, the
1..2147483647 range, and the omitted 120000 ms default when a Darwin
ownership-helper compile times out. A change applies after REA restarts,
on the next ownership-helper compile.

Producer SIGXCPU and SIGXFSZ recovery says REA retains the tighter
inherited limit. Agent-visible fixed caps in this theme say this release
has no runtime override. Numbers are unchanged.

Refs #5910

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: morluto <morluto@users.noreply.github.com>

src/process/DarwinProcessRunTokenReader.timeout.test.ts

@@ -1,6 +1,10 @@
 import { describe, expect, it } from "vitest";
 
-import { resolveSwiftcCompileTimeoutMs } from "./DarwinProcessRunTokenReader.js";
+import {
+  resolveSwiftcCompileTimeoutMs,
+  swiftcCompileTimeoutRecovery,
+} from "./DarwinProcessRunTokenReader.js";
+import { MAX_PROVIDER_STARTUP_TIMEOUT_MS } from "../config/providerStartupTimeout.js";
 
 describe("resolveSwiftcCompileTimeoutMs", () => {
   it("keeps the historical default when unset", () => {
@@ -31,4 +35,14 @@ describe("resolveSwiftcCompileTimeoutMs", () => {
       }),
     ).toBe(120_000);
   });
+
+  it("names the launch-environment deadline, range, and restart on a timeout", () => {
+    const recovery = swiftcCompileTimeoutRecovery(300_000);
+    expect(recovery).toContain("REA_SWIFTC_COMPILE_TIMEOUT_MS");
+    expect(recovery).toContain("300000 ms");
+    expect(recovery).toContain(`1..${String(MAX_PROVIDER_STARTUP_TIMEOUT_MS)}`);
+    expect(recovery).toContain("120000 ms");
+    expect(recovery).toContain("restart REA");
+    expect(recovery).toContain("next ownership-helper compile");
+  });
 });