feat(workflow-engine): Add TypedDicts for WorkflowValidator input format

[kcons]

Allows us to lean on mypy a bit more for correctness.

[saponifi3d]

🫶 - love the addition of types and stricter checking than before.

[saponifi3d]

we might want to have the name error if it's an empty string. i believe there's a unique constraint on the names, so it could get a little 😵

[saponifi3d]

🤔 should we have an DetectorTrigger, ActionFilterInput, WorkflowTriggerInput as detailed types? that way we can enforce stuff like a detectors conditions always must return a valid PriorityLevel? (not sure if there are other things we could enforce more strictly down, i feel like those might be helpful for folks making custom validators like the metric alert validator)

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[github-actions]

Backend Test Failures

Failures on 289098c in this run:

tests/sentry/api/endpoints/test_project_rule_details.py::UpdateProjectRuleTest::test_invalid_rule_node — log

tests/sentry/api/endpoints/test_project_rule_details.py:1451: in test_invalid_rule_node
    self.get_error_response(
src/sentry/testutils/cases.py:663: in get_error_response
    assert_status_code(response, status_code)
src/sentry/testutils/asserts.py:47: in assert_status_code
    assert minimum <= response.status_code < maximum, (
E   AssertionError: (500, b'{"detail":"Internal Error","errorId":null}')
E   assert 500 < 401
E    +  where 500 = <Response status_code=500, "application/json">.status_code

tests/sentry/api/endpoints/test_project_rule_details.py::UpdateProjectRuleTest::test_rule_form_not_valid — log

tests/sentry/api/endpoints/test_project_rule_details.py:1471: in test_rule_form_not_valid
    self.get_error_response(
src/sentry/testutils/cases.py:663: in get_error_response
    assert_status_code(response, status_code)
src/sentry/testutils/asserts.py:47: in assert_status_code
    assert minimum <= response.status_code < maximum, (
E   AssertionError: (500, b'{"detail":"Internal Error","errorId":null}')
E   assert 500 < 401
E    +  where 500 = <Response status_code=500, "application/json">.status_code

tests/sentry/api/endpoints/test_project_rule_details.py::UpdateProjectRuleTest::test_invalid_rule_node_type — log

tests/sentry/api/endpoints/test_project_rule_details.py:1431: in test_invalid_rule_node_type
    self.get_error_response(
src/sentry/testutils/cases.py:663: in get_error_response
    assert_status_code(response, status_code)
src/sentry/testutils/asserts.py:47: in assert_status_code
    assert minimum <= response.status_code < maximum, (
E   AssertionError: (500, b'{"detail":"Internal Error","errorId":null}')
E   assert 500 < 401
E    +  where 500 = <Response status_code=500, "application/json">.status_code