pytest improvements to handle flaky test (#2726)

* build(dev): add pytest-randomly dependency

By randomizing the test execution order, this helps identify tests
that unintentionally depend on shared state or specific execution
order, which can lead to flaky or unreliable test behavior.

* build(dev): add pytest-timeout

This will prevent a test from running indefinitely

* test: block external requests in CI and set default 10s timeout per test

* test: adding missing cassettes

We notice that those cassettes are missing after enabling block-network on CI

* test: increase tests timeout on CI

* test: fix flaky test ValueError: Circular reference detected (id repeated)

* fix: prevent crash when event handler raises exception

Previously, if a registered event handler raised an exception during execution,
it could crash the entire application or interrupt the event dispatch process.
This change wraps handler execution in a try/except block within the `emit` method,
ensuring that exceptions are caught and logged without affecting other handlers or flow.

This improves the resilience of the event bus, especially when handling third-party
or temporary listeners.

.github/workflows/tests.yml

@@ -31,4 +31,4 @@ jobs:
         run: uv sync --dev --all-extras
 
       - name: Run tests
-        run: uv run pytest tests -vv
+        run: uv run pytest --block-network --timeout=60 -vv