chore: relax worker dep pins for local Python 3.14

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/superpowers/plans/2026-07-10-lyra-walking-skeleton.md

@@ -11,7 +11,7 @@
 ## Global Constraints
 
 - Node.js 22 LTS; Next.js App Router (not Pages Router); TypeScript strict mode on.
-- Python 3.12; database access via `psycopg` v3 (not psycopg2); raw SQL only in the worker.
+- Python 3.12 in the worker container (`python:3.12-slim`); local test runs may use a newer 3.x — keep worker deps version-flexible so they install on both. Database access via `psycopg` v3 (not psycopg2); raw SQL only in the worker.
 - **Prisma is the single owner of the database schema.** The worker never issues DDL; it reads/writes tables Prisma migrated. Worker tests assume `prisma migrate deploy` has already been run against the target database.
 - PostgreSQL 17.
 - One `DATABASE_URL` (Postgres connection string) is shared by both services via environment.
@@ -134,8 +134,8 @@ export default function Home() {
 
 `worker/requirements.txt`:
 ```
-psycopg[binary]==3.2.3
-pytest==8.3.4
+psycopg[binary]>=3.2,<4
+pytest>=8.3,<9
 ```
 
 `worker/lyra_worker/__init__.py`: