* Add tests for auto-subscribe on first send and isolated sender with no peers
* Add PR CI workflow with tiered test strategy
- pr_tests.yml: build job with cache, wrapper-tests, smoke-tests,
and label-triggered full-suite
- test_common.yml: add deploy_allure/send_discord inputs so PR runs
skip reporting side effects
- Add docker_required marker to S19 (needs Docker, excluded from
wrapper-only CI job)
- Register docker_required marker in pytest.ini
* Document PR CI test workflows in README
* Refine PR CI test strategy:
- Exclude `docker_required` tests from smoke set in `pr_tests.yml`.
- Add `wait_for_connected` helper for connection state checks.
- Update S19 test to dynamically create and clean up the store node setup.
- General simplifications and improved test stability.
* Add `wait_for_connected` assertion to ensure sender connection state before propagation test
* Refine tests and CI workflows:
- Replace `ERROR_TIMEOUT_S` with `ERROR_AFTER_CACHE_EXPIRY_TIMEOUT_S` in `test_send_e2e.py`.
- Adjust timeout assertion for better clarity and accuracy.
- Update `pr_tests.yml` to add retries (`--reruns`) and ignore wrapper tests in smoke tests.
- Change `test_common.yml` default Discord reporting to `false`.
* Normalize `portsshift` to `portsShift` in `test_send_e2e.py` configuration definitions.
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Co-authored-by: Egor Rachkovskii <egorrachkovskii@status.im>
