Make CI stable and faster #2913

Why

CI on main is too flaky and too slow to trust:

• Only 29–30% of PR runs (33–40% on main) are green on the first attempt. Most red runs pass on an unchanged rerun.
• A green PR run takes 41 min at p50 and 80 min at p90.
• Unity license retries cost about 9 min per build job, 7,150 min over 30 days. A PR run starts 14 build jobs against 7–8 floating licenses shared with the team.
• Caches sit at ~11 GB against the 10 GB quota, so LRU eviction keeps runs cold.

A red run that goes green on a rerun teaches everyone to ignore red, and real regressions hide in the noise.

What

A stack of small PRs, each fixing one cause:

• Fail fast: stop the run when the SDK build fails, and cap job run time with timeout-minutes.
• Retries: retry known infra failures once, by a specific log signature that is printed when it fires. Examples: LicensingClient IPC timeout, an editor killed at startup, a Unity shutdown crash, Gradle 429, a segfaulting build tool, sentry-cli 5xx, an ingest 5xx on the crash report. Product and test bugs get fixed, not retried.
• Root-caused flakes:
  • Native symbolication: sentry-cli returns before sentry.io has processed the upload, so events arrive before their symbols. The upload assertion now waits until sentry.io lists the uploaded debug files.
  • iOS first launch: a launch less than ~2 min after the simulator boots can stall for minutes. The simulator now boots while the app compiles.
  • Unity 6000.6 in Docker: Unity kills the PID in a Library/burst.pid copied from the Create job, which turned out to be the editor's own xvfb-run. The stale pid files are now deleted before each build.
  • An Android test app that never initialises is relaunched once.
  • App Hang events are ignored in the iOS Crash Capture lookup.
  • The playmode integration tests get 5 s to receive an event.
  • ConfigureOptions run a second time cleared the options configuration. This is an SDK bug users can hit too, with a CHANGELOG entry and EditMode tests.
• Speed:
  • Two fewer Unity launches per integration test build, 52 → 24 launches per PR run.
  • Integration test and native SDK caches keyed on their inputs.
  • The leftover .NET 9 install and the workload restore are gone.
  • The iOS size baseline and the simulator terminate stall are off the Run iOS critical path.
  • The license retry is jittered and capped at 30 min.

Results so far

Ten back-to-back reruns of the unchanged stack tip:

• One of the two red runs was the ConfigureOptions bug, fixed since in ci: fix the symbolication, iOS first-launch, ingest 5xx and burst.pid flakes #2911; its final head is green on the first attempt in 27.3 min.
• The other was a one-off Unity-internal Bee IPC error (Request cancelled while reading the binlog).
• A full-matrix run (5 Unity versions) of the stack is green.

Merge order

The PRs are stacked; each one is based on the one below it. Merge from the bottom up. sentry-unity squash-merges, so after each merge the next PR is rebased onto main and its CI reruns.

app-runner goes first. The stack pins its PRs' exact commits, and merging them with merge commits keeps those pins valid:

1. Skip the iOS simulator terminate right after boot and bound the others app-runner#65 (pinned by ci: take the iOS size baseline and the terminate stall off the Run iOS path #2910)
2. fix(adb): Force-stop the app before each launch and after a run timeout app-runner#64 (pinned by test: relaunch an Android test app that never initialised once #2901)
3. feat: Add Filter parameter to Get-SentryTestEvent app-runner#63 (pinned by test: ignore App Hang events in the iOS Crash Capture lookup #2899)
4. main (app-runner)

sentry-unity, from the tip of the stack down to main:

1. ci: fix the symbolication, iOS first-launch, ingest 5xx and burst.pid flakes #2911 Fix the symbolication, iOS first-launch, ingest 5xx and burst.pid flakes, plus the ConfigureOptions fix
2. ci: take the iOS size baseline and the terminate stall off the Run iOS path #2910 Take the iOS size baseline and the terminate stall off the Run iOS path (needs app-runner#65)
3. ci: key the native SDK caches on their own inputs and skip the workload restore #2909 Key the native SDK caches on their own inputs and skip the workload restore
4. ci: recover from LicensingClient IPC timeouts, sentry-cli 5xx and flush timeouts #2908 Recover from LicensingClient IPC timeouts, sentry-cli 5xx and flush timeouts
5. test: give the playmode integration tests 5 s to receive an event #2906 Give the playmode integration tests 5 s to receive an event
6. ci: cap job run time with timeout-minutes #2905 Cap job run time with timeout-minutes
7. ci: retry known infra failures once, by signature #2904 Retry known infra failures once, by signature
8. test: launch Unity two fewer times per integration test build #2903 Launch Unity two fewer times per integration test build
9. ci: key the integration test caches on their inputs #2902 Key the integration test caches on their inputs
10. test: relaunch an Android test app that never initialised once #2901 Relaunch an Android test app that never initialised once (needs app-runner#64)
11. ci: jitter the Unity license retry and cap it at 30 minutes #2900 Jitter the Unity license retry and cap it at 30 minutes
12. test: ignore App Hang events in the iOS Crash Capture lookup #2899 Ignore App Hang events in the iOS Crash Capture lookup (needs app-runner#63)
13. ci: fail fast when the SDK build fails #2898 Fail fast when the SDK build fails
14. ci: drop the leftover .NET 9 install from the Linux native SDK build #2907 Drop the leftover .NET 9 install from the Linux native SDK build
15. main