fix: drop redis env

.env.example

@@ -70,7 +70,6 @@ INFILL_BEARER_TOKEN="<rotate-at-infill-service>"
 GITEA_URL="https://gitea.example.com"
 GITEA_TOKEN="<rotate-in-gitea>"
 GITHUB_API_TOKEN="<rotate-in-github-settings>"                     # ghp_... / github_pat_...
-REDIS_URL="redis://localhost:6379"
 
 # ── Sentry (error tracking + source maps) ──
 # Source maps upload — create a token at: Settings > Projects > freno-dev > Client Keys (DSN) > Auth Token

src/env/server.ts

@@ -53,7 +53,6 @@ const serverEnvSchema = z.object({
   VITE_WEBSOCKET: z.string().min(1),
   VITE_INFILL_ENDPOINT: z.string().min(1),
   INFILL_BEARER_TOKEN: z.string().min(1),
-  REDIS_URL: z.string().min(1),
   NESSA_DB_URL: z.string().min(1),
   NESSA_DB_TOKEN: z.string().min(1),
   // Clerk authentication — Nessa auth is now Clerk-backed. The
@@ -171,7 +170,6 @@ export const getMissingEnvVars = (): string[] => {
     "VITE_GOOGLE_CLIENT_ID_MAGIC_DELVE",
     "VITE_GITHUB_CLIENT_ID",
     "VITE_WEBSOCKET",
-    "REDIS_URL",
     "NESSA_DB_URL",
     "NESSA_DB_TOKEN",
     "NESSA_CLERK_SECRET",