Enable HTTPS by default in development environment

This commit enables HTTPS in the development environment using self-signed
certificates to further improve dev-prod parity and catch SSL-related issues
early.

Changes made:

1. Created self-signed certificate for localhost
   - File: infrastructure/kubernetes/overlays/dev/dev-certificate.yaml
   - Type: Self-signed via cert-manager
   - Validity: 90 days (auto-renewed)
   - Valid for: localhost, bakery-ia.local, *.bakery-ia.local, 127.0.0.1
   - Issuer: selfsigned-issuer ClusterIssuer

2. Updated dev ingress to enable HTTPS
   - File: infrastructure/kubernetes/overlays/dev/dev-ingress.yaml
   - Enabled SSL redirect: ssl-redirect: false → true
   - Added TLS configuration with certificate
   - Updated CORS origins to prefer HTTPS (HTTPS URLs first, HTTP fallback)
   - Access: https://localhost (instead of http://localhost)

3. Added cert-manager resources to dev overlay
   - File: infrastructure/kubernetes/overlays/dev/kustomization.yaml
   - Added dev-certificate.yaml
   - Added selfsigned-issuer ClusterIssuer

4. Created comprehensive HTTPS setup guide
   - File: docs/DEV-HTTPS-SETUP.md
   - Includes certificate trust instructions for macOS, Linux, Windows
   - Testing procedures with curl and browsers
   - Troubleshooting guide
   - FAQ section

5. Updated dev-prod parity documentation
   - File: docs/DEV-PROD-PARITY-CHANGES.md
   - Added HTTPS as 4th improvement
   - Updated "What Stays Different" table (SSL/TLS → Certificates)
   - Added HTTPS benefits section

Benefits:
✓ Matches production HTTPS-only behavior
✓ Tests SSL/TLS configurations in development
✓ Catches mixed content warnings early
✓ Tests secure cookie handling (Secure, SameSite attributes)
✓ Validates cert-manager integration
✓ Tests certificate auto-renewal
✓ Better security testing capabilities

Impact:
- Browser will show certificate warning (self-signed)
- Users can trust certificate or click "Proceed"
- No additional resource usage
- Access via https://localhost (was http://localhost)

Certificate details:
- Type: Self-signed
- Algorithm: RSA 2048-bit
- Validity: 90 days
- Auto-renewal: 15 days before expiration
- Common Name: localhost
- DNS Names: localhost, bakery-ia.local, *.bakery-ia.local
- IP Addresses: 127.0.0.1, ::1

Setup required:
- Optional: Trust certificate in system/browser (see DEV-HTTPS-SETUP.md)
- Required: cert-manager must be installed in cluster
- Access at: https://localhost

What stays different from production:
- Certificate type: Self-signed (dev) vs Let's Encrypt (prod)
- Trust: Manual (dev) vs Automatic (prod)
- Domain: localhost (dev) vs real domain (prod)

This completes the dev-prod parity improvements, bringing development
environment much closer to production with:
1. 2 replicas for critical services ✓
2. Rate limiting enabled ✓
3. Specific CORS origins ✓
4. HTTPS enabled ✓

See docs/DEV-HTTPS-SETUP.md for complete setup and testing instructions.

infrastructure/kubernetes/overlays/dev/dev-ingress.yaml

@@ -4,16 +4,21 @@ metadata:
   name: bakery-ingress
   namespace: bakery-ia
   annotations:
-    nginx.ingress.kubernetes.io/ssl-redirect: "false"
-    nginx.ingress.kubernetes.io/force-ssl-redirect: "false"
+    # Dev-Prod Parity: Enable HTTPS by default
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
+
     # Dev-Prod Parity: Use specific origins instead of wildcard to catch CORS issues early
-    nginx.ingress.kubernetes.io/cors-allow-origin: "http://localhost,http://localhost:3000,http://localhost:3001,http://127.0.0.1,http://127.0.0.1:3000,http://127.0.0.1:3001,http://bakery-ia.local,https://localhost,https://127.0.0.1"
+    # HTTPS origins first (preferred), with HTTP fallback for development flexibility
+    nginx.ingress.kubernetes.io/cors-allow-origin: "https://localhost,https://localhost:3000,https://localhost:3001,https://127.0.0.1,https://127.0.0.1:3000,https://127.0.0.1:3001,https://bakery-ia.local,http://localhost,http://localhost:3000,http://localhost:3001,http://127.0.0.1,http://127.0.0.1:3000"
     nginx.ingress.kubernetes.io/cors-allow-methods: "GET, POST, PUT, DELETE, OPTIONS, PATCH"
     nginx.ingress.kubernetes.io/cors-allow-headers: "Content-Type, Authorization, X-Requested-With, Accept, Origin, Cache-Control"
     nginx.ingress.kubernetes.io/cors-allow-credentials: "true"
     nginx.ingress.kubernetes.io/enable-cors: "true"
+
     # Prevent nginx from redirecting to add trailing slashes
     nginx.ingress.kubernetes.io/use-regex: "true"
+
     # Development, SSE and WebSocket annotations
     nginx.ingress.kubernetes.io/proxy-read-timeout: "3600"
     nginx.ingress.kubernetes.io/proxy-connect-timeout: "600"
@@ -22,10 +27,16 @@ metadata:
     nginx.ingress.kubernetes.io/proxy-buffering: "off"
     nginx.ingress.kubernetes.io/proxy-http-version: "1.1"
     nginx.ingress.kubernetes.io/upstream-keepalive-timeout: "3600"
+
     # WebSocket upgrade support
     nginx.ingress.kubernetes.io/websocket-services: "gateway-service"
 spec:
   ingressClassName: nginx
+  tls:
+  - hosts:
+    - localhost
+    - bakery-ia.local
+    secretName: bakery-dev-tls-cert
   rules:
   - host: localhost
     http: