fix(scripts): drop unlisted dotenv dep in schema generator

generate-drizzle-schema.mjs imported 'dotenv/config' but dotenv is not a
dependency, failing knip and crashing 'pnpm db:schema:generate'. Load .env
with Node's built-in process.loadEnvFile like the other scripts do
(scripts/load-env.ts), never overriding vars already set in the shell.

scripts/generate-drizzle-schema.mjs

@@ -8,8 +8,7 @@
 // drizzle-kit (`pnpm db:generate` / studio / introspect) is draft/browse tooling only.
 //
 // Usage: pnpm db:schema:generate
-import "dotenv/config";
-import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from "node:fs";
 import { dirname, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
 
@@ -31,6 +30,13 @@ const ROOT = resolve(__dirname, "..");
 const SCHEMA_TS = resolve(ROOT, "src/db/schema.ts");
 const OUT = SCHEMA_TS;
 
+// Load .env like the TS scripts do (process.loadEnvFile never overrides
+// variables already present in the shell).
+for (const name of [".env.local", ".env"]) {
+	const file = resolve(ROOT, name);
+	if (existsSync(file)) process.loadEnvFile(file);
+}
+
 // ---------- Parse existing Drizzle schema (naming source of truth) ----------
 const schemaSource = readFileSync(SCHEMA_TS, "utf-8");