fix: v0.4.1 — remove pause_container / unpause_container (DSM unsupported)

Live test on this DSM firmware: SYNO.Docker.Container has no pause/
unpause method ("Method does not exist"). The Container Manager GUI
action menu only exposes Start / Stop / Force-Stop / Restart / Reset —
pause/resume simply isn't a feature here.

The two tools were briefly shipped in 0.4.0 (implemented by symmetry
with the verified stop call) and have now been removed rather than
left as a broken surface. The remaining lifecycle tools
(start_container, stop_container, restart_container) are unaffected.

Tool count: 33 → 31. Closes #7 (won't fix — DSM limitation).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,20 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.4.1] - 2026-05-18
+
+### Removed
+
+- `pause_container` and `unpause_container` (added in 0.4.0) — live
+  test against DSM revealed that Container Manager on this firmware
+  does not expose pause/resume at all. The GUI action menu only offers
+  Start / Stop / Force-Stop / Restart / Reset, and direct calls to
+  `SYNO.Docker.Container/pause` and `/unpause` return "Method does not
+  exist". Both tools have been removed rather than left as a broken
+  surface. The remaining three lifecycle tools (`start_container`,
+  `stop_container`, `restart_container`) are unaffected. Tool count
+  drops from 33 to 31. Closes #7 (won't fix — DSM-side limitation).
+
 ## [0.4.0] - 2026-05-18
 
 ### Added