Surveyed the local NIP mirror for audio/podcast kinds. Fixes the earlier wrong
"NIP-54-style podcast events" ref (NIP-54 is Wiki) and records the real targets:
NIP-A0 Voice Messages (kind 1222/1244), NIP-73 External Content IDs (podcast:guid
/ item / publisher — the Podcasting 2.0 bridge), NIP-53 live audio (30311/30312,
overlaps #16), NIP-71 audio variants (imeta m audio/* + waveform), and notes that
the podcasts we filter today are bespoke native kind-30078 with imeta m audio/*,
while music apps (Wavlake/Stemstr) use non-standard custom kinds.
Co-Authored-By: Claude Opus 4.8 <[email protected]>