v0.6.2

• Normalization (#210): angle bound clamping now keeps every repaired branch
  interval ordered. One sided intervals wholly outside the supported window are
  widened to the configured pad instead of producing angmin > angmax; Rust,
  C ABI, and Python normalize option coverage pin the behavior.
• Binding coverage (#185): the already shipped study block and distribution
  graph projection now have C ABI and Python accessors. The remaining geo
  binding symbols stay in the v0.6.3 follow through.
• BMOPF diagnostics (#219): distribution conversions now carry structured
  diagnostics alongside warning strings, and transformer export losses expose
  stable EMIT.BMOPF.* codes for downstream tests and capability checks.
• BMOPF transformer fidelity (#214, #215, #216, #217): OpenDSS fixed
  transformer taps, center tap convention fields, delta_wye leakage referral,
  and n_winding delta_roll now export directly in BMOPF form with regression
  coverage against schema valid output and unaffected fixture byte identity.
• BMOPF source fidelity (#218): per phase OpenDSS voltage sources on the same
  bus merge into one BMOPF voltage_source when their phase angles are
  coherent; ambiguous, bounded, priced, or conflicting source banks stay split
  with warnings.
• Distribution capabilities (#213): the C ABI dist feature exposes
  pio_dist_capabilities_json, reporting the six BMOPF fidelity flags that
  PowerIO.jl and downstream tools can probe at runtime.
• Geographic fields (#180): balanced and distribution models now share typed
  GeoMeta / Location JSON shapes. Network.geo, Bus.location,
  DistNetwork.geo, and DistBus.location are optional and omitted when
  absent. OpenDSS Buscoords and BMOPF longitude/latitude sideloads promote into
  typed bus locations; OpenDSS writes a Buscoords sidecar when locations are
  present, while BMOPF longitude/latitude output remains opt in and only emits
  declared geographic coordinates.
• .pio.json model JSON: the balanced and multiconductor payload schema
  versions move from 1.0.0 to 1.1.0 for the additive geographic fields.
  The package metadata schema, C ABI version, and Python package surface stay
  in the 0.6 compatibility band.
• JSON strategy: .pio.json docs now state that it is PowerIO's compiled
  artifact, not a case format; payload schemas are for validating model JSON
  inside .pio.json documents; powerio-json remains supported, is deprecated
  for CLI file handoffs, and is no longer shown in the PR conversion matrix.

What's Changed

• Keep angle bound clamp repairs ordered by @samtalki in #211
• Expose study and dist graph bindings by @samtalki in #212
• Emit structured BMOPF transformer diagnostics by @samtalki in #220
• Preserve fixed OpenDSS transformer taps in BMOPF export by @samtalki in #221
• Emit BMOPF center tap transformers in the BMOPF convention by @samtalki in #222
• Refer BMOPF delta_wye leakage to each winding base by @samtalki in #223
• Emit explicit delta_roll for BMOPF n_winding transformers by @samtalki in #224
• Merge split OpenDSS voltage sources in BMOPF export by @samtalki in #225
• Expose distribution capability flags through C ABI by @samtalki in #226
• Add typed geographic fields to network models by @samtalki in #227
• Prepare v0.6.2 release by @samtalki in #228

Full Changelog: v0.6.1...v0.6.2