v0.38.0

What's Changed

• Probe singular enrichment over the #521 junction-residue cluster (#565) by @stevenmburns in #566
• Near-open convergence probe with Z+Y drift (#478) by @stevenmburns in #567
• Group singular enrichment under validation/experimental in the B-spline gear menu (#565) by @stevenmburns in #568
• chore: adopt momwire 0.17.0 (enrichment over every ground model) by @stevenmburns in #569
• fix(web): detect and mark multi-feed build_network() designs (#570, #571) by @stevenmburns in #572
• feat(hexbeam): single common feed via build_network(), drop PyNEC-only build_tls by @stevenmburns in #573
• refactor: move legacy build_tls design to a test fixture; drop its NEC export by @stevenmburns in #574
• Add BalancedLine differential two-conductor TL element (#575) by @stevenmburns in #577
• Physics validation for BalancedLine: MoM pair oracle + Sterba common-mode residual (#576) by @stevenmburns in #581
• Reject named wires that no PortOnWire references — silent open-gap trap (#578) by @stevenmburns in #582
• fix(network): normalize port sign convention to the authored wire direction (#580) by @stevenmburns in #583
• PortAtEnd: junction-node ports at conductor ends (#579) by @stevenmburns in #584
• BalancedLine common-mode path (zcomm) + wire.sterba_bl catalog promotion with derived backend-capability signalling by @stevenmburns in #585
• chore: bump momwire pin to 0.18.0 (junction ports) by @stevenmburns in #586
• chore: release v0.38.0 (BalancedLine transmission-line curtains) by @stevenmburns in #587

Full Changelog: v0.37.0...v0.38.0