Improve the Config class and routes

[skupriienko]

Links:

• Jira

Actions:

• Core SDK & Client:

  • Refactor Config class to use a deterministic, data-driven routing approach with EXACT_ROUTES and PREFIX_ROUTES.
  • Fix domain endpoint routing to correctly resolve and fallback between API versions (V1, V3, V4) without substring matching fallacies.
  • Update domains_handler to properly construct hierarchical and nested URLs (e.g., credentials, IPs, webhooks).
  • Implement smart logging (telemetry) in Endpoint and AsyncEndpoint to capture detailed request URLs and API errors.
  • Fix httpx DeprecationWarning in AsyncEndpoint by routing serialized string/byte payloads to the content= parameter instead of data=.

• Integration Tests:

  • Fix OpenSSL key generation in DomainTests to use the -traditional flag, ensuring valid PKCS1 format for DKIM tests.
  • Fix RFC 6376 grammar violation by changing the DKIM selector name from test_selector to test-selector.
  • Fix AttributeError in AsyncKeysTests by correctly referencing self.domain instead of the uninitialized self.test_domain.
  • Mark tests affected by Mailgun Sandbox quota limits and eventual consistency delays with @pytest.mark.xfail(reason=...) (e.g., test_verify_domain, test_get_sending_queues, test_update_account_tag, test_delete_key).

• Unit Tests:

  • Add tests/unit/test_routes.py to enforce strict schemas for routing dictionaries and prevent overlapping keys.
  • Update test_config.py to validate the new fallback and alias mapping logic.
  • Fix TypeError in test_client.py caused by comparing MagicMock objects to integer HTTP status codes.
  • Fix Windows CI FileNotFoundError in test_async_client.py by safely monkeypatching the broken SSL_CERT_FILE environment variable during httpx.AsyncClient initialization.

• Linting & Formatting:

  • Apply refurb modernizations: replace try/except: pass with contextlib.suppress, optimize equality checks with the in operator, and utilize implicit truthiness for collection checks.
  • Resolve pyright strict typing errors: eliminate blanket # type: ignore comments, explicitly declare | None unions, and implement type narrowing for object attributes to prevent OptionalMemberAccess errors.

• CI & Repository Management:

  • Update .github/dependabot.yml to group minor and patch updates and set an open PR limit.
  • Update .github/workflows/commit_checks.yaml to install test dependencies and execute unit tests during CI runs.

[skupriienko]

@erz9engel I would wait for unit tests from #32 because it will be better to validate a new logic

[ybiletskyianaconda]

Great work!

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