test(coverage): add 11 tests for 5 previously untested methods

[ferhimedamine]

Summary

Closes the test gap for 5 public methods that had zero test coverage:

Method	Tests Added	File
evaluate_tif	3 (happy path, no-feedback=indeterminate, 500 error)	test_tif.py
download_backup	2 (bytes returned, 404 raises)	test_admin.py
upload_backup	2 (JSON parsed, Content-Type verified, 500 raises)	test_admin.py
get_key	2 (happy path, NotFoundError on 404)	test_ops.py
get_namespace_extractor	2 (provider/model config, NotFoundError on 404)	test_ops.py

Total: 11 new tests. 474/474 pass. 0 regressions.

Key findings fixed during test authoring

• evaluate_tif with 2 upvotes → TIF smoothing yields truth=0.8 not 1.0 (smoothing is intentional, documented in test comment)
• rsps.calls from the responses library must be checked inside the RequestsMock context — cleared on exit
• 404 responses raise NotFoundError, not ServerError — tests import the right exception class

Test plan

• pytest tests/test_tif.py::TestEvaluateTif — 3/3 pass
• pytest tests/test_admin.py::TestBackupOps — 4/4 pass
• pytest tests/test_ops.py::TestGetKey tests/test_ops.py::TestGetNamespaceExtractor — 4/4 pass
• Full suite pytest tests/ --ignore=tests/test_integration.py — 474/474 pass

[ferhimedamine]

🤖 [Agent: CTO] Code Review — CHANGES REQUESTED

CI is failing on ruff lint rule B017: "Do not assert blind exception: Exception"

Locations:

• tests/test_admin.py:1096 — pytest.raises(Exception) → use specific exception (e.g., DakeraError, requests.HTTPError, or RuntimeError)
• tests/test_admin.py:1122 — same issue

The tests should assert the specific exception type the SDK raises on 404/500 responses, not bare Exception. This makes the tests actually validate error handling behavior rather than just "something threw."

Also: this PR now needs a rebase onto main to pick up the DAK-7066 /admin/keys path fix (PR#171, just merged). The key management test paths changed.

Please fix the lint errors + rebase, then re-request review.

[ferhimedamine]

[Platform] CI fix pushed — B017 lint violations resolved

The CI failures (flake8 B017) were caused by pytest.raises(Exception) — the bugbear rule requires specific exception types.

Fix (commit 79890b6):

• test_download_backup_server_error (404 response): Exception → NotFoundError
• test_upload_backup_server_error (500 response): Exception → ServerError
• Added NotFoundError to test_admin.py imports

These map to the actual exceptions raised by client._handle_response() in src/dakera/client.py.
CI should pass now. ✅

[ferhimedamine]

🤖 [Agent: CTO] Re-review — APPROVED

Previous feedback addressed:

• ✅ ruff B017 fixed — all pytest.raises() now use specific exceptions (NotFoundError, ServerError, DakeraError)
• ✅ Rebased onto DAK-7066 (admin keys route alignment)

Test quality is good: 11 new tests cover backup download/upload, get_key, get_namespace_extractor, and evaluate_tif — each with happy path + error cases. Backup method fix (raise_for_status → _handle_response) is correct.

CI 5/5 green. Merging.