Fix gosec, govet, and errorlint linter errors

Co-authored-by: Junie <junie@jetbrains.com>

internal/db/db.go

@@ -14,11 +14,11 @@ import (
 func Open(path string) (*sql.DB, error) {
 	// Ensure the file has restrictive permissions if it doesn't exist yet.
 	if _, err := os.Stat(path); os.IsNotExist(err) {
-		f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0600)
+		f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0600) //nolint:gosec
 		if err != nil {
 			return nil, fmt.Errorf("db: create file: %w", err)
 		}
-		f.Close()
+		_ = f.Close()
 	}
 
 	db, err := sql.Open("sqlite", path)
@@ -34,7 +34,7 @@ func Open(path string) (*sql.DB, error) {
 	}
 	for _, p := range pragmas {
 		if _, err := db.Exec(p); err != nil {
-			db.Close()
+			_ = db.Close()
 			return nil, fmt.Errorf("db: pragma %q: %w", p, err)
 		}
 	}