chore: consolidate platform split checks

docs/audits/2026-07-09-dependency-audit.md

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+# Dependency Audit - 2026-07-09
+
+Commands:
+
+```bash
+cd /mnt/DATA/git/govoplan-core
+bash scripts/check-dependency-audits.sh
+```
+
+Status: remediated.
+
+Initial result:
+
+- Python audit failed: 24 advisories were reported across `cryptography`,
+  `pip`, `python-multipart`, `pyzipper`, and `starlette`.
+- npm production audit passed: `npm audit --omit=dev` reported 0
+  vulnerabilities.
+
+Python findings:
+
+| Package | Installed | Advisory count | Minimum reported fix |
+| --- | ---: | ---: | --- |
+| `cryptography` | `44.0.0` | 5 | `48.0.1` |
+| `pip` | `26.0.1` | 3 | `26.1.2` |
+| `python-multipart` | `0.0.17` | 7 | `0.0.31` |
+| `pyzipper` | `0.3.6` | 1 | `0.4.0` |
+| `starlette` | `0.41.3` | 8 | `1.3.1` |
+
+Private GovOPlaN packages were skipped by `pip-audit` because they are not
+published on PyPI. That is expected for local editable development installs.
+
+The remediation below upgrades those dependencies and records the compatibility
+checks run against core, files, and campaign behavior.
+
+## Remediation
+
+Remediation applied on 2026-07-09:
+
+- upgraded core's FastAPI floor to `fastapi>=0.139,<1`, resolving Starlette to
+  `starlette==1.3.1`
+- upgraded core's cryptography floor to `cryptography>=48.0.1,<50`, resolving
+  to `cryptography==49.0.0`
+- declared the files module upload parser dependency as
+  `python-multipart>=0.0.31,<1`, resolving to `python-multipart==0.0.32`
+- upgraded the campaign ZIP dependency to `pyzipper>=0.4,<1`, resolving to
+  `pyzipper==0.4.0`
+- upgraded the local audit environment to `pip==26.1.2`
+- removed the obsolete local `govoplan-module-multimailer` editable install
+  from the audit environment so the audit reflects the split module product
+
+Post-remediation result:
+
+- `bash scripts/check-dependency-audits.sh`: passed, no known Python
+  vulnerabilities found and npm production audit reported 0 vulnerabilities.
+- `python -m pip check`: passed.
+- `bash scripts/check-module-matrix.sh`: passed.
+- `python -m unittest tests.test_api_smoke`: passed.
+- campaign encrypted/plain ZIP smoke with `pyzipper==0.4.0`: passed.
+
+Notes:
+
+- `pip-audit` still reports private GovOPlaN packages as skipped because they
+  are not published on PyPI. That is expected for editable local development
+  installs.
+- `httpx2>=2.5,<3` is included in development requirements so Starlette's
+  `TestClient` uses the non-deprecated backend. `httpx==0.28.1` remains in dev
+  requirements for tests that mock connector HTTP responses directly.
+- Split-module API routers now use Starlette's renamed
+  `HTTP_422_UNPROCESSABLE_CONTENT` status constant. This preserves the 422
+  status code while avoiding the deprecated `HTTP_422_UNPROCESSABLE_ENTITY`
+  alias.