docs(kaisa): ProAudio 主路线、WirePlumber default-profile 与一键脚本

- 新增 OPERATION_PipeWire_Kaisa_ProAudio / UCM_HiFi，核心问题复盘与恢复 Ubuntu 重测手顺；HDMI 旧文改为 stub。
- 脚本：apply / verify-pro-audio、strip default-profile、reapply-session、remove deb 与 UCM overlay、verify-audio-environment。
- systemd-user：kaisa-pro-audio-reapply.service 示例。
- README、docs 索引、REPO_INDEX、REPRO deb 存档说明；deb 标为未来计划；reference/ucm2 与采集脚本小改。
- debian 与 _bmad-output 规划文件随本次工作区一并更新。

Made-with: Cursor

debian/kaisa-hdmi-pipewire-fix/DEBIAN/control

@@ -12,10 +12,11 @@ Description: Google Kaisa HDMI audio fix (PipeWire / sof-rt5682, UCM2)
  GoogleKaisa/sof-rt5682) for Jack-driven HDMI routes plus IEC958 sequences,
  and a system-wide WirePlumber drop-in (pro-audio profile, HDMI sink
  priorities). Does not ship helper binaries or user systemd units yet —
- use manual pactl/amixer steps in OPERATION until automated restore is ready.
- UCM-first and pro-audio WirePlumber are mutually exclusive — see
- /usr/share/doc/kaisa-hdmi-pipewire-fix/README.md and OPERATION.
+ use manual pactl/amixer steps in upstream docs (ProAudio / UCM) until
+ automated restore is ready. UCM-first and pro-audio WirePlumber are mutually
+ exclusive — see /usr/share/doc/kaisa-hdmi-pipewire-fix/README.md and
+ docs in the source tree: OPERATION_PipeWire_Kaisa_ProAudio.md,
+ OPERATION_PipeWire_Kaisa_UCM_HiFi.md.
  .
  PCI path in the WirePlumber fragment targets BDF 0000:00:1f.3; edit under
- /etc/wireplumber/ if needed. See OPERATION_PipeWire_Kaisa_HDMI.md.gz in
- /usr/share/doc/.
+ /etc/wireplumber/ if needed.