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

internal/db/gorm/fts5_test.go

@@ -0,0 +1,42 @@
+//go:build fts5
+
+package gorm
+
+import (
+	"database/sql"
+	"os"
+	"path/filepath"
+	"testing"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+// TestFTS5Available verifies FTS5 is available in mattn/go-sqlite3
+func TestFTS5Available(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "fts5_test_*")
+	if err != nil {
+		t.Fatalf("create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	dbPath := filepath.Join(tmpDir, "test.db")
+
+	// Open with mattn/go-sqlite3 driver
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		t.Fatalf("open database: %v", err)
+	}
+	defer db.Close()
+
+	// Try to create FTS5 virtual table
+	_, err = db.Exec(`
+		CREATE VIRTUAL TABLE test_fts USING fts5(
+			content
+		)
+	`)
+	if err != nil {
+		t.Fatalf("create FTS5 table failed: %v", err)
+	}
+
+	t.Logf("✅ FTS5 is available in mattn/go-sqlite3")
+}