feat: enable prepared statement caching via statementNameGenerator

Add deterministic prepared statement names (SHA-256 hash of SQL) to both
writer and replica PrismaPg adapters. This lets PostgreSQL reuse cached
query plans instead of parsing and planning every query from scratch.

The old Rust engine did this automatically; the driver adapter requires
explicit opt-in via the statementNameGenerator option (added in v7.6.0).

Co-Authored-By: Eric Allam <eallam@icloud.com>

Author: devin-ai-integration[bot]

apps/webapp/app/db.server.ts

@@ -8,6 +8,7 @@ import {
   type PrismaTransactionOptions,
 } from "@trigger.dev/database";
 import { PrismaPg } from "@prisma/adapter-pg";
+import { createHash } from "node:crypto";
 import invariant from "tiny-invariant";
 import { z } from "zod";
 import { env } from "./env.server";
@@ -117,12 +118,20 @@ function getClient() {
 
   console.log(`🔌 setting up prisma client to ${redactUrlSecrets(databaseUrl)}`);
 
-  const adapter = new PrismaPg({
-    connectionString: databaseUrl.href,
-    max: env.DATABASE_CONNECTION_LIMIT,
-    idleTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
-    connectionTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
-  });
+  const adapter = new PrismaPg(
+    {
+      connectionString: databaseUrl.href,
+      max: env.DATABASE_CONNECTION_LIMIT,
+      idleTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
+      connectionTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
+    },
+    {
+      // Generate deterministic prepared statement names from query SQL so PostgreSQL
+      // can reuse cached query plans. Without this, every query uses an anonymous
+      // prepared statement that PG must parse and plan from scratch each time.
+      statementNameGenerator: (query) => `p_${createHash("sha256").update(query.sql).digest("hex").slice(0, 16)}`,
+    }
+  );
 
   const client = new PrismaClient({
     adapter,
@@ -240,12 +249,17 @@ function getReplicaClient() {
 
   console.log(`🔌 setting up read replica connection to ${redactUrlSecrets(replicaUrl)}`);
 
-  const adapter = new PrismaPg({
-    connectionString: replicaUrl.href,
-    max: env.DATABASE_CONNECTION_LIMIT,
-    idleTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
-    connectionTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
-  });
+  const adapter = new PrismaPg(
+    {
+      connectionString: replicaUrl.href,
+      max: env.DATABASE_CONNECTION_LIMIT,
+      idleTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
+      connectionTimeoutMillis: env.DATABASE_CONNECTION_TIMEOUT * 1000,
+    },
+    {
+      statementNameGenerator: (query) => `p_${createHash("sha256").update(query.sql).digest("hex").slice(0, 16)}`,
+    }
+  );
 
   const replicaClient = new PrismaClient({
     adapter,