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>

plugin/scripts/worker-service.cjs

@@ -1157,7 +1157,7 @@ No previous sessions found for project "${r}".`}]};let i=[];i.push("# Recent Ses
 \u{1F4A1} Search Strategy:
 1. Search with index to see titles, dates, IDs
 2. Use timeline to get context around interesting results
-3. Batch fetch full details: get_batch_observations(ids=[...])
+3. Batch fetch full details: get_observations(ids=[...])
 
 Tips:
 \u2022 Filter by type: obs_type="bugfix,feature"