Add sample_rate property and fix test_monitor

[codecov[bot]]

:x: 1567 Tests Failed:

Tests completed	Failed	Passed	Skipped
19893	1567	18326	4413

View the top 1 failed tests by shortest run time

> > ```python > tests.test_scope test_with_isolation_scope > ``` > >

Stack Traces | 0.001s run time

> > > > > ```python > > tests/test_scope.py:357: in test_with_isolation_scope > > assert scope is in_with_isolation_scope > > E assert is > > ``` > >

View the full list of 2 :snowflake: flaky tests

> > ```python > tests.test_scope test_with_isolation_scope_data > ``` > > **Flake rate in main:** 99.17% (Passed 2 times, Failed 239 times) >

Stack Traces | 0.001s run time

> > > > > ```python > > tests/test_scope.py:387: in test_with_isolation_scope_data > > assert scope._tags == {"before_isolation_scope": 1} > > E AssertionError: assert {} == {'before_isolation_scope': 1} > > E > > E Right contains 1 more item: > > E {'before_isolation_scope': 1} > > E > > E Full diff: > > E + {} > > E - { > > E - 'before_isolation_scope': 1, > > E - } > > ``` > >

tests.test_scope test_with_new_scope

Flake rate in main: 97.03% (Passed 8 times, Failed 261 times)

Stack Traces | 0.001s run time

> > ```python > tests/test_scope.py:587: in test_with_new_scope > assert scope is in_with_current_scope > E assert is > ```

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