* feat(chat): bump Open WebUI subpath build to v0.12.0
The port + GHCR publish were already done in the SushantGautam/open-webui
fork (tag v0.12.0-subpath, functional head 92f0108 == main). This wires it
into Studio:
- docker-compose.yml: OPEN_WEBUI_IMAGE default -> :v0.12.0-subpath
- build.sh: pinned SHA -> 15818d88 (pristine v0.12.0)
- subpath.patch: regenerated as 15818d88..92f0108 EXCLUDING .github/FORK.md
(198 files); git apply --check clean on pristine alongside the node-heap
and otel patches. Old patch kept as subpath-v0.11.4.patch.
- README.md / UPGRADE.md: current base + outcome log updated
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* fix(ports): match Open WebUI owner by package name, not checkout path
_classify_command substring-matched the whole command line against
the open-webui and open_webui spellings. A checkout whose path contains
open-webui (e.g. this worktree) made every listener process classify as
Studio's own Open WebUI - a forc…
