fix(javascript): require exactly one fork IPC channel (#8017)

* fix(javascript): require exactly one fork IPC channel

Node's fork() rejects an explicit stdio array that carries more than one IPC
channel, and the throw is synchronous, before any child process exists:

    if (ArrayPrototypeFilter(options.stdio, ...'ipc').length > 1)
      throw new ERR_IPC_ONE_PIPE()

The analysis already dropped an array with no "ipc" (#7992) but still reported a
resolved fork for an array carrying it twice.

Measured on Node 24.22.1:

    fork({stdio: ["ipc", "ipc"]})                -> THROWS ERR_IPC_ONE_PIPE
    fork({stdio: ["pipe", "ipc", "ipc"]})        -> THROWS ERR_IPC_ONE_PIPE
    fork({stdio: ["ipc"]})                       -> SPAWNED connected=true
    fork({stdio: ["pipe", "ipc"]})               -> SPAWNED connected=true
    fork({stdio: ["pipe", "pipe", "pipe", "ipc"]})-> SPAWNED connected=true

So the required count is exactly one, not at least one. Count the resolved "ipc"
literals and reject the candidate unless the count is one; a spread or an
unreadable element may still change the count and is left alone, as before.

* chore: retrigger title and readiness checks after the title was corrected

src/domain/javascript/javascriptSemanticAnalysis.fork_stdio_ipc.test.ts

@@ -37,6 +37,18 @@ it.each([
   ]);
 });
 
+/**
+ * Exactly one channel is required: naming `"ipc"` twice throws ERR_IPC_ONE_PIPE
+ * for the same synchronous reason, so those calls are not spawns either.
+ */
+it.each([
+  ["ipc twice", `["ipc", "ipc"]`],
+  ["three ipc entries", `["ipc", "ipc", "ipc"]`],
+  ["a pipe between two ipc entries", `["pipe", "ipc", "ipc"]`],
+] as const)("emits no fork for a stdio array with %s", (_name, stdio) => {
+  expect(spawnsFor(`fork("worker.js", { stdio: ${stdio} })`)).toEqual([]);
+});
+
 it.each([
   ["a string stdio", `fork("worker.js", { stdio: "pipe" })`],
   ["omitted stdio", `fork("worker.js", {})`],