docs: say engine removal is best effort when PAIR is uninstalled

The README and the engine lifecycle page said removing PAIR, or resetting its data, removes the engines PAIR installed. A reset now stops and says which engine it could not remove, but a platform uninstaller cannot stop halfway: it leaves that engine in place and finishes. Say so, and where to remove it from.

Signed-off-by: Terve <ntervalon@nvidia.com>

Author: Noah-Tervalon-Nvidia

README.md

@@ -197,7 +197,9 @@ as well. Dragging PAIR to the Trash instead
 leaves the privileged helper registered, so use the uninstaller.
 
 Your data means settings, logs, cluster identity and certificates, and any engine
-PAIR installed for you. **Model weights are not touched** — they live in the
+PAIR installed for you. An engine the uninstaller cannot remove — one still
+holding a file open, say — is left in place rather than stopping the uninstall;
+remove it with its own uninstaller. **Model weights are not touched** — they live in the
 engine's own storage (`~/.ollama`, `~/.llamacpp`, `~/.lmstudio/models`), so
 removing PAIR does not delete the models you downloaded. Delete those through the
 engine, or by removing its directory. An engine you installed yourself is also

docs/engine-lifecycle.mdx

@@ -130,8 +130,10 @@ Uninstalling an engine does **not** remove its models. Downloaded model files st
 on disk in the engine's own storage — `~/.ollama`, `~/.llamacpp`, or
 `~/.lmstudio/models` — so uninstalling and reinstalling does not cost you
 re-downloading them. The same is true of removing PAIR itself, or of resetting
-its data: those remove the engines PAIR installed, never your models. To reclaim
-that space, use **Delete** on individual models, or remove the engine's storage
+its data. Both remove the engines PAIR installed as far as they can, and never
+your models: a reset stops and tells you if an engine cannot be removed, while
+uninstalling PAIR leaves that engine in place and finishes. To reclaim that
+space, use **Delete** on individual models, or remove the engine's storage
 directory yourself.
 
 PAIR keeps the model folder at the engine's default location. If you moved LM