test: remove two load-dependent CI flakes (#34613)

- git-binary-compatibility: give the docker image runs of the ref-pairing case
  a 90 s budget; each Git call is a docker exec and the case normally takes
  22-25 s of the 30 s default.
- claude-transcript-catch-up: fire the 5 ms catch-up deadline with fake timers
  only after the fallback lookup has started, instead of racing a real timer.

src/shared/git-binary-compatibility.test.ts

@@ -50,6 +50,8 @@ const image = process.env.ORCA_GIT_COMPAT_IMAGE
 const binary = process.env.ORCA_GIT_COMPAT_BINARY
 const expectedVersion = process.env.ORCA_GIT_COMPAT_VERSION
 const describeBinaryCompatibility = image || binary ? describe : describe.skip
+const PAIRS_REFS_TEST =
+  'pairs published, tracked and default refs with configured repositories, on the selected Git binary'
 
 type GitResult = { stdout: string; stderr: string }
 
@@ -112,7 +114,8 @@ describeBinaryCompatibility('real Git binary compatibility', () => {
     }
   })
 
-  it('pairs published, tracked and default refs with configured repositories, on the selected Git binary', async () => {
+  // Each Git call is a docker exec: image runs take 22-25 s of a 30 s default, so loaded runners tripped it.
+  it(PAIRS_REFS_TEST, { timeout: image ? 90_000 : undefined }, async () => {
     const root = join(repoPath, 'copy-url')
     await mkdir(root)
     const cwd = image ? '/repo/copy-url' : root