test: cover the drug form lookups and the static prescription check

[marceloarocha]

Increases test coverage on two features that had none. Tests only — no production code changes.

Drug form lookups — tests/integration/test_drug_form_resources.py (17 tests)

The catalogues the prescription drug form loads before it can be rendered:
GET /drugs/resources/<idDrug>/<idSegment>[/<idHospital>], GET /drugs/frequencies
and GET /lists/routes.

• the full measure-unit and frequency catalogues, and their ordering by description
• the counts carried over from the drug's aggregated history, including the fact that a
  previously prescribed id comes back twice (history entry with the count, catalogue
  entry with zero) and that history from another segment is ignored
• the /<idHospital> variant returning the same payload as the two-segment route
• an unknown drug returning an empty name with the requested id echoed back
• routes and intervals staying empty outside the complete mode
• extraFields / removeFields read from the transcription-fields and
  transcription-remove-fields memories, and the empty case
• map-routes parsing: configured entries, absent memory, and malformed entries skipped
• the permission gates (READ_PRESCRIPTION on the drug endpoints,
  READ_BASIC_FEATURES on /lists/routes)

Static prescription check — tests/integration/test_static_prescription_status.py (14 tests)

POST /static/prescriptions/status — the endpoint an external system calls to check a
prescription on behalf of one of its own users, identified by external id. The caller
authenticates as a SERVICE_INTEGRATOR (RUN_AS).

• happy path: the status is set, attributed to the origin user rather than the
  service integrator, and audited with serviceUser: true
• the response payload, and undoing a check with status 0
• rejections: unknown external id, inactive origin user, origin user of another schema,
  origin user without segment authorization, origin user without WRITE_PRESCRIPTION,
  unknown prescription, and a status that does not change the prescription
• the prescription is left untouched when the origin user is refused
• the RUN_AS permission gate and the authentication gate

Test hygiene

Both files clean their own rows and are re-runnable: the drug fixture reuses the
reserved >= 90000 id range already wiped by tests/conftest.py::_cleanup, the origin
users use the test%@example.com pattern and drop their own usuario_autorizacao rows,
and the memory helper snapshots and restores whatever the schema already held instead of
deleting seed data.

Verification

Full suite against a local PostgreSQL loaded from noharm-ai/database (the same SQL
files CI uses): 2323 passed (2292 before), and green on a second consecutive run to
confirm re-runnability. ruff check . passes.

Note (no change made)

While covering static_check, one behaviour stood out and was deliberately left
untested rather than pinned down: when idOriginUser is absent from the payload, the
lookup becomes User.external IS NULL, which matches whichever seed user comes back
first — so a caller omitting the field can end up running as an arbitrary user. It is
non-deterministic, so no test asserts it. Worth a look separately if you agree it's a
hole.

🤖 Generated with Claude Code

https://claude.ai/code/session_01HJNm2wnqhhzgxa3bx8NSpS

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Generated by Claude Code

[amazon-q-developer]

This PR adds comprehensive test coverage for two features that previously had none: drug form lookup endpoints and static prescription checking. The test implementations are solid with proper cleanup, isolation, and re-runnability. No defects found that would block merge.

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