Refactor: OpenWebUI (remove numba pin) (#18026)

* Open WebUI: stop when the install fails three times

The retry loop fell through to "Installed Open WebUI" after the third
failure, so the service was created without a binary and the URL never
answered (#18020). The last attempt now runs under the error trap, which
shows uv's output.

* Open WebUI: keep the retry inline, no function in the script

* Open WebUI: same retry on the update paths, and drop the numba constraint

The migration and update loops in ct/openwebui.sh fell through to
"Updated" after three failures just like the install did. The numba
constraint from #11874 guarded openai-whisper's old pin; 0.12.x depends
on faster-whisper and never resolves numba.

* formatting

ct/openwebui.sh

@@ -49,10 +49,13 @@ function update_script() {
 
     msg_info "Installing uv-based Open-WebUI"
     PYTHON_VERSION="3.12" setup_uv
-    for attempt in $(seq 1 3); do
-      $STD uv tool install --python 3.12 --constraint <(echo "numba>=0.60") open-webui[all] && break
-      [[ $attempt -lt 3 ]] && msg_warn "Open WebUI install attempt $attempt failed, retrying..." && sleep 10
+    installed=0
+    for attempt in 1 2; do
+      $STD uv tool install --python 3.12 open-webui[all] && { installed=1; break; }
+      msg_warn "Open WebUI install attempt $attempt failed, retrying..."
+      sleep 10
     done
+    ((installed)) || $STD uv tool install --python 3.12 open-webui[all]
     msg_ok "Installed uv-based Open-WebUI"
 
     msg_info "Restoring data"
@@ -125,10 +128,13 @@ EOF
       OTEL_ARGS+=(--with "$pkg")
     done < <(uv pip list --python "$OWUI_PYTHON" --format freeze 2>/dev/null | grep -i '^opentelemetry-' | cut -d= -f1)
   fi
-  for attempt in $(seq 1 3); do
-    $STD uv tool install --force --python 3.12 --constraint <(echo "numba>=0.60") "${OTEL_ARGS[@]}" open-webui[all] && break
-    [[ $attempt -lt 3 ]] && msg_warn "Open WebUI update attempt $attempt failed, retrying..." && sleep 10
+  updated=0
+  for attempt in 1 2; do
+    $STD uv tool install --force --python 3.12 "${OTEL_ARGS[@]}" open-webui[all] && { updated=1; break; }
+    msg_warn "Open WebUI update attempt $attempt failed, retrying..."
+    sleep 10
   done
+  ((updated)) || $STD uv tool install --force --python 3.12 "${OTEL_ARGS[@]}" open-webui[all]
   systemctl restart open-webui
   msg_ok "Updated Open WebUI"
   msg_ok "Updated successfully!"

install/openwebui-install.sh

@@ -47,10 +47,13 @@ if [[ ${prompt,,} =~ ^(y|yes)$ ]]; then
 fi
 
 msg_info "Installing Open WebUI"
-for attempt in $(seq 1 3); do
-  $STD uv tool install --python 3.12 --constraint <(echo "numba>=0.60") "${OTEL_ARGS[@]}" open-webui[all] && break
-  [[ $attempt -lt 3 ]] && msg_warn "Open WebUI install attempt $attempt failed, retrying..." && sleep 10
+installed=0
+for attempt in 1 2; do
+  $STD uv tool install --python 3.12 "${OTEL_ARGS[@]}" open-webui[all] && { installed=1; break; }
+  msg_warn "Open WebUI install attempt $attempt failed, retrying..."
+  sleep 10
 done
+((installed)) || $STD uv tool install --python 3.12 "${OTEL_ARGS[@]}" open-webui[all]
 msg_ok "Installed Open WebUI"
 
 prompt="${var_openwebui_ollama:-}"