general improvements (#17)

* refactor(hooks): simplify hook execution with shared context

- [x] Extract BaseInput struct to eliminate duplicate fields across hooks
- [x] Create RunHook handler pattern for session-start and user-prompt
- [x] Create RunStatuslineHook for fast statusline rendering without worker startup
- [x] Add HookContext struct to pass port, project, CWD, SessionID to handlers
- [x] Add db/interface.go with ObservationReader/Writer interfaces
- [x] Add comprehensive conflict management tests in sqlite/conflict_test.go
- [x] Add vector client tests for Count, ModelVersion, NeedsRebuild, GetStaleVectors
- [x] Add FilterByThreshold helper tests for query result filtering
- [x] Make handlers_test more robust for network-dependent update checks
- [x] Update package versions in UI

* Move to GORM + general cleanup

* feat(mcp): add observation relations discovery and scoring integration

- [x] Add find_related_observations MCP tool for discovering related observations by confidence
- [x] Integrate scoring calculator and recalculator into MCP server initialization
- [x] Add pattern, relation, and session stores to MCP server dependencies
- [x] Register MCP server in Claude Code settings during plugin installation
- [x] Update install scripts (bash, PowerShell) to configure MCP server settings
- [x] Switch plugin manifest files to template-based versioning (plugin.json.tpl, marketplace.json.tpl)
- [x] Update all MCP server tests to pass new dependency parameters

plugin/.claude-plugin/marketplace.json

@@ -1,22 +0,0 @@
-{
-  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
-  "name": "claude-mnemonic",
-  "version": "1.0.0",
-  "description": "Persistent memory system for Claude Code - stores observations, session summaries, and user prompts with semantic search",
-  "owner": {
-    "name": "lukaszraczylo",
-    "email": "lukaszraczylo@users.noreply.github.com"
-  },
-  "plugins": [
-    {
-      "name": "claude-mnemonic",
-      "description": "Persistent memory system for Claude Code - Go implementation with SQLite and ChromaDB",
-      "version": "1.0.0",
-      "author": {
-        "name": "lukaszraczylo"
-      },
-      "source": "./",
-      "category": "productivity"
-    }
-  ]
-}

plugin/.claude-plugin/plugin.json

@@ -1,9 +0,0 @@
-{
-  "name": "claude-mnemonic",
-  "version": "1.0.0",
-  "description": "Persistent memory system for Claude Code - Go implementation with SQLite and ChromaDB",
-  "author": {
-    "name": "lukaszraczylo",
-    "email": "lukaszraczylo@users.noreply.github.com"
-  }
-}