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/main/claude/claude-transcript-catch-up.test.ts

@@ -407,10 +407,23 @@ describe('Claude chat catch-up', () => {
     const c = await chat('-old-work', '/new-work')
     await c.write([...chatTurn, ...outsideTurn])
     const lookup = Promise.withResolvers<string | null>()
+    const lookupStarted = Promise.withResolvers<void>()
     const resolve = vi
       .spyOn(sessionFileResolver, 'resolveSessionFilePath')
-      .mockReturnValueOnce(lookup.promise)
-    expect(await c.open('a1', { timeoutMs: 5 })).toBe(false)
+      .mockImplementationOnce(() => {
+        lookupStarted.resolve()
+        return lookup.promise
+      })
+    // Fire the deadline only once the lookup is in flight; a real 5 ms timer raced slow runners.
+    vi.useFakeTimers({ toFake: ['setTimeout', 'clearTimeout', 'Date'] })
+    try {
+      const opened = c.open('a1', { timeoutMs: 5 })
+      await lookupStarted.promise
+      vi.advanceTimersByTime(5)
+      expect(await opened).toBe(false)
+    } finally {
+      vi.useRealTimers()
+    }
     expect(resolve.mock.calls[0]?.[3]?.aborted).toBe(true)
     lookup.resolve(null)
     await new Promise<void>((done) => setImmediate(done))

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