Version 0.0.20

proxbox-api 0.0.20 pairs with netbox-proxbox 0.0.24,
proxmox-sdk 0.0.13, and netbox-sdk 0.0.10. The package supports Python
3.12 and 3.13 and certifies its NetBox integration through NetBox 4.6.6.

Compatibility and reliability

• Adds NetBox 4.6.6 to the generated custom-field object-type and E2E
  compatibility matrices.
• Keeps the package resolver bounded to supported Python 3.12 and 3.13
  runtimes while retaining the released netbox-sdk 0.0.10 client.
• Makes deterministic Proxmox tag styling work in FIPS environments by marking
  the non-security MD5 use explicitly.
• Generates the large E2E matrix through a tested Python helper, with pull
  requests following the same bounded untrusted matrix as ordinary pushes and
  release-only expansion reserved for published candidates.

Release integrity

• Builds one wheel and one sdist from the exact tagged commit and publishes them
  to the Gitea Package Registry, which remains the artifact of record.
• Validates the tag against a strict version pattern before anything is built,
  and verifies the package is present in the registry after upload.
• Subscribes to the tag push event only. Gitea emits both create and push
  for a tag, and subscribing to both would start two immutable uploads for one
  version.
• Creates the public GitHub Release for final tags only, so a release candidate
  never reaches PyPI as though it were final.
• Builds the public-index distributions from the same tagged commit, so what
  reaches TestPyPI and PyPI corresponds to the published source rather than a
  separately fetched copy. Uploads never use --skip-existing, so a failure
  always advances to a new immutable version rather than silently succeeding.

Known limitation: publication hardening is deferred

This release publishes through in-repository jobs on the existing shared
runners — the same path used by 0.0.19 and every currently published version.
The locked release control plane developed during this cycle is not active,
because the isolated runner fleet it requires does not exist yet: no runner
advertises ci-release-proxbox-api, and the control repository has no runners.

Specifically, this version does not yet have: credential-free target builds,
an exact-byte sealed handoff to a separately administered isolated publisher,
supervisor-signed runner attestation, or egress-denied build isolation. Those
controls are implemented and reviewed in-tree and re-land once the isolated
runners are provisioned.

This is a deliberate, tracked deferral rather than a regression: 0.0.20 ships
at the same publication posture as every release before it.

Upgrade

Deploy the exact proxbox-api 0.0.20 Gitea package, verify /health and
/version, then deploy
netbox-proxbox 0.0.24 and run the cross-stack sync smoke tests before public
promotion.