Add unit tests for Router configuration and transport layers

- Implemented tests for RouterConfig, RoutingOptions, StaticInstanceConfig, and RouterConfigOptions to ensure default values are set correctly.
- Added tests for RouterConfigProvider to validate configurations and ensure defaults are returned when no file is specified.
- Created tests for ConfigValidationResult to check success and error scenarios.
- Developed tests for ServiceCollectionExtensions to verify service registration for RouterConfig.
- Introduced UdpTransportTests to validate serialization, connection, request-response, and error handling in UDP transport.
- Added scripts for signing authority gaps and hashing DevPortal SDK snippets.

examples/router/src/Examples.Gateway/router.yaml

@@ -0,0 +1,50 @@
+# Router Configuration for Example Gateway
+# This file configures how the gateway routes requests to microservices
+
+gateway:
+  nodeId: "gw-demo-01"
+  region: "demo"
+  listenPort: 8080
+
+  # Payload limits
+  payloadLimits:
+    maxRequestBodyBytes: 10485760  # 10 MB
+    maxStreamingChunkBytes: 65536   # 64 KB
+
+  # Health monitoring
+  healthMonitoring:
+    staleThreshold: "00:00:30"
+    checkInterval: "00:00:05"
+
+# Transport configuration
+transports:
+  # In-memory transport (for demo)
+  inMemory:
+    enabled: true
+
+  # TCP transport (production)
+  # tcp:
+  #   enabled: true
+  #   port: 5100
+  #   backlog: 100
+
+  # TLS transport (production with encryption)
+  # tls:
+  #   enabled: true
+  #   port: 5101
+  #   certificatePath: "certs/gateway.pfx"
+  #   certificatePassword: "demo"
+
+# Routing configuration
+routing:
+  # Default routing algorithm
+  algorithm: "round-robin"
+
+  # Region affinity (prefer local microservices)
+  regionAffinity: true
+  affinityWeight: 0.8
+
+# Logging
+logging:
+  level: "Information"
+  requestLogging: true