fix: rename save_memory and fix MCP search instructions + startup hook (#1210)

* fix: rename save_memory to save_observation and fix MCP search instructions

Stop the primary agent from proactively saving memories by renaming
save_memory to save_observation with a neutral description. Remove
"Saving Memories" section from SKILL.md. Update context formatters
and output styles to reference the mem-search skill instead of raw
MCP tool names.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: split SessionStart hooks so smart-install failure doesn't block worker start

smart-install.js and worker-start were in the same hook group, so if
smart-install exited non-zero the worker never started. Split into
separate hook groups so they run independently.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: worker startup waits for readiness before hooks fire

Move initializationCompleteFlag to set after DB/search init (not MCP),
add waitForReadiness() polling /api/readiness, and extract shared
pollEndpointUntilOk helper to DRY up health/readiness checks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/servers/mcp-server.ts

@@ -235,8 +235,8 @@ NEVER fetch full details without filtering first. 10x token savings.`,
     }
   },
   {
-    name: 'save_memory',
-    description: 'Save a manual memory/observation for semantic search. Use this to remember important information.',
+    name: 'save_observation',
+    description: 'Save an observation to the database. Params: text (required), title, project',
     inputSchema: {
       type: 'object',
       properties: {