build(apm): pin the obsidian MCP server and release bin 1.1.3

plugins/bin/.mcp.json declared the obsidian server as
`npx @bitbonsai/mcpvault@latest`, so an unpinned third-party npm package
was fetched and executed at every session start. The apm-consumed install
promoted that string to committed repo-root content in .mcp.json, giving
every clone the same unpinned execution. Pinned to 0.15.0, the version
`latest` currently resolves to.

bin 1.1.2 -> 1.1.3 and marketplace 0.4.0 -> 0.4.1, following the mapping
bb9158d establishes and 3bfdf58 confirms: the marketplace takes the same
bump severity as the highest-severity package bump. kyberforge is not
bumped here, so executables.allow's `kyberforge#1.5.0` key is untouched.

The pin is not live for this working copy until this lands on the remote
and `apm update` re-resolves — apm.lock.yaml still records 1.1.2 and
`@latest`, because the six dependencies resolve from the remote rather
than from the tree beside them. Correct for a fresh clone immediately.

.gitignore gains /.claude-plugin/plugin.json: a bare `apm pack` emits a
root-package manifest there that has never been tracked on any branch.
Scoped to the file, since the sibling marketplace.json is compiled output
that is committed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X7GvKuJfy2WrdBmUttV4DT

.claude-plugin/marketplace.json

@@ -1,7 +1,7 @@
 {
   "name": "holocron",
   "description": "AI development skills for Claude Code and GitHub Copilot CLI — factory, design, implement, review, and cross-cutting workflows.",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "owner": {
     "name": "Defame1297",
     "email": "defame1297@rkdr.net",
@@ -18,7 +18,7 @@
     {
       "name": "bin",
       "description": "A place for things to be binned",
-      "version": "1.1.2",
+      "version": "1.1.3",
       "category": "Utilities",
       "source": "./plugins/bin"
     },