v0.2.0

First minor release on the NetBox 4.6 line. Two themes: tighten the
UX and validation guarantees on top of NetBox 4.6, and start treating
the ACI BD gateway as a first-class NetBox IPAM citizen.

Compatibility: NetBox v4.6 only (4.5 support dropped) · Python 3.12.

Added

• BFD policy + attachment models. ACIBFDInterfacePolicy and
  ACIBFDInterfaceAttachment cover BFD on L3Out logical interfaces
  (migration 0010_bfd), with the same model/form/serializer/table/
  filterset shape as the rest of the L3Out hierarchy.
• BD Subnet IPAM linkage (PR #24). New
  ACIBridgeDomainSubnet.gateway_ipam_ip_address ForeignKey →
  ipam.IPAddress (nullable, SET_NULL). The new field is the
  preferred representation; it participates in NetBox search, IPAM
  utilisation, and audit reporting. Both representations stay visible
  during the deprecation window, and a new display_gateway property
  picks IPAM over the legacy string for __str__, templates, and the
  filterset q search. Per-BD uniqueness is preserved on each
  representation via two partial UniqueConstraints
  (netbox_cisco_aci_acibdsubnet_bd_gw_unique,
  netbox_cisco_aci_acibdsubnet_bd_ipam_unique). clean() requires
  at least one of the two representations to be set. Migration
  0011_bridgedomainsubnet_ipam_ip_address adds the field, drops the
  pre-existing non-partial unique, and installs the two partial
  uniques.
• PLUGINS_CONFIG['netbox_cisco_aci']['l3out_default_protocols']
  to seed L3Out protocol checkboxes on the create form at site level.
• New validations.
  • EPG static port binding: encap_vlan must fall within a VLAN
    pool block reachable through the EPG's domain bindings.
  • External EPG subnet: prefix must be unique across all L3Outs
    sharing the same VRF.
  • AAEP domain association: cannot attach two domains whose VLAN
    pool blocks overlap.
• "Add" buttons on parent detail-page panels for every child model
  removed from the sidebar.

Changed

• BREAKING: NetBox 4.6 only. NetBox 4.5 support is dropped.
  min_version = max_version = "4.6.x". CI matrix narrowed to a
  single v4.6.0 entry.
• BREAKING (UI): Navigation cleaned up from 52 menu items to 19
  across 6 groups (Fabric, Tenancy, Connectivity, Contracts, L3Outs,
  Policies). Child models (selectors, attachments, sub-entries,
  per-port policies, every L3Out child) are removed from the sidebar;
  reach them via Add buttons on parent detail pages. URLs and detail
  pages preserved.
• BD subnet table gains a linkified Gateway (IPAM) column; the
  legacy column is now labelled Gateway (legacy). Both are in
  default_columns with IPAM first.

Deprecated

• ACIBridgeDomainSubnet.gateway_ip (free-form CharField). Existing
  rows continue to round-trip and the field stays visible in forms,
  tables, and the API throughout the 0.2.x line. A future major
  release will remove it; new subnets should use
  gateway_ipam_ip_address instead.

Internal

• CI test scanner hardening. The test_form_dropdown_filters
  regex used a nested-paren alternation that backtracked
  exponentially on a DynamicModelChoiceField whose body contained
  a nested _("...") call. Replaced with a paren-counting walker;
  the same forms now scan in milliseconds.

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