refactor(hls): upgrade to lightcompressor-enhanced 2.1.1-hls-SNAPSHOT

Collapses Amethyst's hand-rolled HLS orchestration onto the library's
HlsUploadHelper.run. The library now ships everything the prior session
had to reimplement: per-rendition width/height/codec metadata on the
onRenditionComplete callback, a public PlaylistRewriter, canonical
HlsContentTypes constants, and the transcode -> upload -> rewrite loop
itself.

- bump libs.versions.toml to 2.1.1-hls-SNAPSHOT
- delete HlsUploadPipeline, HlsBundle, HlsTranscoder, HlsTranscodingSession,
  HlsPlaylistRewriter and their tests; HlsUploadHelper.run + the library
  rewriter cover everything they did
- rewrite HlsVideoEventBuilder to consume HlsRenditionSummary width/height
  directly; drops the master-playlist streamInfRegex entirely
- HlsPublishOrchestrator now wraps HlsUploadHelper.run: a SimpleHlsListener
  drives Transcoding progress while the uploader lambda captures each
  MediaUploadResult in a side-channel map keyed by the library's
  suggestedFilename, so per-rendition sha256/size still flow into the
  NIP-71 imeta tags
- extract HlsBlobUploader into its own file (was inline in the deleted
  HlsUploadPipeline.kt)

Net delta on HLS code: 3194 -> 2182 lines (-1012, ~32%).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

gradle/libs.versions.toml

@@ -38,7 +38,7 @@ genaiPrompt = "1.0.0-beta2"
 genaiRewriting = "1.0.0-beta1"
 languageId = "17.0.6"
 lifecycleRuntimeKtx = "2.10.0"
-lightcompressor-enhanced = "2.1.0"
+lightcompressor-enhanced = "2.1.1-hls-SNAPSHOT"
 markdown = "f92ef49c9d"
 material3 = "1.9.0"
 materialIconsExtended = "1.7.3"