fix: shorten MCP server name to prevent tool name length errors (#360)

* fix: shorten MCP server name to prevent tool name length errors (#358)

Root cause: Claude Code prefixes MCP tool names with
`mcp__plugin_{plugin-name}_{server-name}__` which was 43 chars
for `mcp__plugin_claude-mem_claude-mem-search__`. Combined with
`progressive_description` (22 chars) this exceeded the 64 char limit.

Changes:
- Shortened MCP server name from 'claude-mem-search' to 'mem-search'
  (saves 8 chars, new prefix is 35 chars)
- Renamed `progressive_description` tool to `help` (saves 18 chars)
- Updated SKILL.md to reference new `help` tool name
- Updated internal Server constructor name for consistency

All tool names now safely under 64 char limit:
- Longest is now `get_batch_observations` at 56 chars total
- `help` is only 39 chars total

Fixes #358

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* refactor: rename get_batch_observations to get_observations

The plural form naturally implies multiple items can be fetched,
following WordPress conventions. Simpler and clearer naming.

Also saves 6 additional characters for MCP tool name length.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* docs: update all references to renamed MCP tools

Updated documentation and code comments to reflect:
- progressive_description → help
- get_batch_observations → get_observations

Files updated:
- docs/public/usage/claude-desktop.mdx
- docs/public/architecture/worker-service.mdx
- src/services/worker/FormattingService.ts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

src/servers/mcp-server.ts

@@ -32,7 +32,7 @@ const TOOL_ENDPOINT_MAP: Record<string, string> = {
   'timeline': '/api/timeline',
   'get_recent_context': '/api/context/recent',
   'get_context_timeline': '/api/context/timeline',
-  'progressive_description': '/api/instructions'
+  'help': '/api/instructions'
 };
 
 /**
@@ -259,13 +259,13 @@ const tools = [
     }
   },
   {
-    name: 'progressive_description',
+    name: 'help',
     description: 'Usage help',
     inputSchema: z.object({
       topic: z.enum(['workflow', 'search_params', 'examples', 'all']).default('all')
     }),
     handler: async (args: any) => {
-      const endpoint = TOOL_ENDPOINT_MAP['progressive_description'];
+      const endpoint = TOOL_ENDPOINT_MAP['help'];
       return await callWorkerAPI(endpoint, args);
     }
   },
@@ -280,7 +280,7 @@ const tools = [
     }
   },
   {
-    name: 'get_batch_observations',
+    name: 'get_observations',
     description: 'Batch fetch',
     inputSchema: z.object({
       ids: z.array(z.number()),
@@ -317,7 +317,7 @@ const tools = [
 // Create the MCP server
 const server = new Server(
   {
-    name: 'claude-mem-search-server',
+    name: 'mem-search-server',
     version: '1.0.0',
   },
   {