Add NetBox 4.6.x support (widen compat to 4.5.0 – 4.6.99)

[Kani999]

Summary

Releases 2.2.0 by widening the supported NetBox range from 4.5.0 – 4.5.99 to 4.5.0 – 4.6.99. NetBox 4.6.0 (released 2026-05-05) brings Django 6.0 and several plugin-API deprecations, but a source-level audit confirms none of the public APIs this plugin uses are changed in 4.6 — so this is a metadata-only release.

• Bumps max_version in PluginConfig from 4.5.99 → 4.6.99
• Bumps pyproject.toml version to 2.2.0
• Updates README badge, requirements, and compatibility matrix
• Adds a [2.2.0] CHANGELOG entry documenting the audit findings
• No changes to views/, templates/, template_override.py, or urls.py

API audit against v4.6.0 upstream tag

Every NetBox import this plugin makes was verified file-by-file against the netbox-community/netbox v4.6.0 tag. All targets are present at the same module path with identical signatures:

Import	NetBox 4.6 location	Status
ViewTab(label, visible, badge, weight, permission, hide_if_empty)	utilities/views.py:244	identical signature
register_model_view(model, name, path, detail, kwargs)	utilities/views.py:354	identical signature
htmx_partial	utilities/htmx.py	present
EnhancedPaginator, get_paginate_count	utilities/paginator.py	present
TagFilterField	utilities/forms/fields/fields.py:106	present
CustomFieldTypeChoices, CustomFieldUIVisibleChoices	extras/choices.py	present
BaseTable	netbox/tables/tables.py:39	present
NetBoxModelFilterSetForm	netbox/forms/filtersets.py:18	present
SavedFiltersMixin	netbox/forms/mixins.py	present
registry['views'][app_label][model_name] shape	netbox/registry.py + utilities/views.py:381	identical
PluginConfig, get_plugin_config	netbox/plugins/__init__.py, plugins/utils.py	present

4.6 deprecations that do not affect this plugin:

• registry['models'] key (Deprecate the models registry key netbox-community/netbox#21890) — we only touch registry['views'].
• Legacy actions = {...} dict on views (Deprecate support for legacy view actions netbox-community/netbox#21887) — we don't declare actions; our register_model_view(model, name=..., path=...) shape is the supported one.
• housekeeping, LOGIN_REQUIRED, querystring template tag — unused.

Upstream dependency

netbox_custom_objects v0.5.0 declares min_version="4.4.0", max_version="4.6.99" and is recommended on NetBox 4.6. Critically, its customobject.html still lacks {% model_view_tabs object %} in the hardcoded {% block tabs %}, so our template_override.install() mechanism and the copied template remain required and structurally correct.

Test plan

• ruff check netbox_custom_objects_tab/ — clean
• ruff format --check netbox_custom_objects_tab/ — 7 files already formatted
• pytest tests/ under local NetBox 4.5.10 — 53 / 53 passed (regression guard; no source changed)
• Install under NetBox 4.6.0: confirm PluginConfig.ready() runs without IncompatiblePluginError
• Combined tab on a Device page: badge, pagination, search, tag/type filter, HTMX in-place updates
• Typed tabs with typed_models: ['dcim.*']: type-specific columns, filterset sidebar, bulk actions, configure-table
• CO→CO tab: tab appears on a Custom Object detail page that is referenced by another Type
• Watch server log for any Django 6.0 deprecation warnings attributable to this plugin (none expected)