Rename npm scripts to environment-prefixed names (dev:/prod:/devtoprod:/prodto:dev:/infra:).

Align package.json scripts and their references across scripts/, infra/, and db/ SQL with the dev-first workflow naming scheme.

Co-authored-by: Cursor <cursoragent@cursor.com>

db/schema.sql

@@ -1,5 +1,5 @@
 -- Virtual Art Gallery — canonical PostgreSQL schema
--- Applied by: npm run migrate (server/migrate.js)
+-- Applied by: npm run dev:migrate (server/migrate.js)
 -- Incremental ALTER migrations in db/migrate-*.sql run after this on existing databases.
 
 CREATE TABLE IF NOT EXISTS historical_eras (