release: bump plugin manifests to 3.3.1

version-guard workflow checks five sources must agree:
mempalace/version.py, pyproject.toml, .claude-plugin/marketplace.json,
.claude-plugin/plugin.json, .codex-plugin/plugin.json.

Initial release commit missed the three plugin manifests.

.claude-plugin/marketplace.json

@@ -9,7 +9,7 @@
       "name": "mempalace",
       "source": "./.claude-plugin",
       "description": "AI memory system — mine projects and conversations into a searchable palace. 19 MCP tools, auto-save hooks, guided setup.",
-      "version": "3.3.0",
+      "version": "3.3.1",
       "author": {
         "name": "milla-jovovich"
       }

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "mempalace",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "description": "Give your AI a memory — mine projects and conversations into a searchable palace. 19 MCP tools, auto-save hooks, and guided setup.",
   "author": {
     "name": "milla-jovovich"

.codex-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "mempalace",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "description": "Give your AI a memory — mine projects and conversations into a searchable palace. 19 MCP tools, auto-save hooks, and guided setup.",
   "author": {
     "name": "milla-jovovich"