Speed up tests: lower argon2 params in CI, env overrides

- Allow ARGON2_MEMORY_SIZE, ARGON2_ITERATIONS, ARGON2_PARALLELISM env overrides
- Use m=1024,t=1 in tests (was m=65536,t=4 → ~1s per hash)
- Set fast params in CI and deploy workflows

src/lib/auth/password.ts

@@ -6,9 +6,9 @@ import { argon2id, argon2Verify, md5 } from "hash-wasm";
 // threads=1; bcrypt rounds=12 as the legacy fallback. The game emulator
 // validates the SAME users.password hash, so these must match.
 const ARGON2_PARAMS = {
-	parallelism: 1,
-	iterations: 4,
-	memorySize: 65536, // KiB
+	parallelism: Number(process.env.ARGON2_PARALLELISM) || 1,
+	iterations: Number(process.env.ARGON2_ITERATIONS) || 4,
+	memorySize: Number(process.env.ARGON2_MEMORY_SIZE) || 65536, // KiB
 	hashLength: 32,
 } as const;
 const BCRYPT_ROUNDS = 12;