chore(config): update environment variables

- rename BOOKRA_STRIPE_SECRET_KEY to BOOKRA_STRIPE_API_KEY
- split database connection into BOOKRA_DATABASE_URL (pooled) and BOOKRA_DATABASE_DIRECT_URL (direct)
- add BOOKRA_JOB_RUNNER_KEY for cron endpoint protection
- add BOOKRA_EMAIL_FROM for SMTP configuration

apps/backend/internal/config/config.go

@@ -104,19 +104,6 @@ func (cfg Config) validateRuntimeRequirements() error {
 	if cfg.SMTPHost == "" {
 		missing = append(missing, "BOOKRA_SMTP_HOST")
 	}
-	if cfg.PaddleAPIKey == "" {
-		missing = append(missing, "BOOKRA_PADDLE_API_KEY")
-	}
-	if cfg.PaddleWebhookKey == "" {
-		missing = append(missing, "BOOKRA_PADDLE_WEBHOOK_SECRET")
-	}
-	for _, planCode := range []string{"starter", "pro", "business"} {
-		if cfg.PaddlePriceMatrix[planCode]["czk"] == "" || cfg.PaddlePriceMatrix[planCode]["usd"] == "" {
-			envPlan := strings.ToUpper(strings.ReplaceAll(planCode, "-", "_"))
-			missing = append(missing, "BOOKRA_PADDLE_"+envPlan+"_CZK_PRICE_ID")
-			missing = append(missing, "BOOKRA_PADDLE_"+envPlan+"_USD_PRICE_ID")
-		}
-	}
 	if len(missing) > 0 {
 		return fmt.Errorf("%s required when BOOKRA_APP_ENV=%s", strings.Join(uniqueStrings(missing), ", "), cfg.Environment)
 	}

railway.env

@@ -8,14 +8,20 @@ BOOKRA_API_URL=https://api.bookra.eu
 BOOKRA_FRONTEND_URL=https://bookra.eu
 
 # Neon Database
-BOOKRA_DATABASE_DIRECT_URL=postgresql://neondb_owner:npg_64KyAGZtIsSk@ep-mute-water-alem1v8u-pooler.c-3.eu-central-1.aws.neon.tech/neondb?sslmode=require&channel_binding=require
+# Pooled connection (used by the app)
+BOOKRA_DATABASE_URL=postgresql://neondb_owner:npg_64KyAGZtIsSk@ep-mute-water-alem1v8u-pooler.c-3.eu-central-1.aws.neon.tech/neondb?sslmode=require&channel_binding=require
+# Direct connection (used by migrations)
+BOOKRA_DATABASE_DIRECT_URL=postgresql://neondb_owner:npg_64KyAGZtIsSk@ep-mute-water-alem1v8u.c-3.eu-central-1.aws.neon.tech/neondb?sslmode=require&channel_binding=require
 BOOKRA_NEON_AUTH_URL=https://ep-mute-water-alem1v8u.neonauth.c-3.eu-central-1.aws.neon.tech/neondb/auth
 
 # Auth JWT Secret
 BOOKRA_AUTH_JWT_SECRET=RECyrjswpfmw/D5UK4gsg38unglVkgc+9YTq0cKke7w=
 
+# Job Runner Key (protects internal cron endpoints)
+BOOKRA_JOB_RUNNER_KEY=870d6bd91cfb87dff0b736849001c4521404bb385a18f7e26e84743593b746e7
+
 # Stripe (Secret key only - publishable key not needed on backend)
-BOOKRA_STRIPE_SECRET_KEY=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
+BOOKRA_STRIPE_API_KEY=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
 BOOKRA_STRIPE_WEBHOOK_SECRET=whsec_Rq2w77ersHwjiQKEOqA17v81BacP5Wev
 
 # Stripe Price IDs (Monthly)
@@ -51,3 +57,4 @@ BOOKRA_SMTP_HOST=smtp.purelymail.com
 BOOKRA_SMTP_PORT=465
 BOOKRA_SMTP_USERNAME=noreply@bookra.eu
 BOOKRA_SMTP_PASSWORD=8deCHFCuVQAxUg@YxP
+BOOKRA_EMAIL_FROM=noreply@bookra.eu