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.

docs/router/SPRINT_7000_0005_0003_cancellation.md

@@ -30,29 +30,29 @@ Implement cancellation semantics on both gateway and microservice sides. When HT
 
 | # | Task ID | Status | Description | Working Directory |
 |---|---------|--------|-------------|-------------------|
-| 1 | CAN-001 | TODO | Define CancelPayload with Reason code | Common |
-| 2 | CAN-002 | TODO | Define cancel reason constants | ClientDisconnected, Timeout, PayloadLimitExceeded, Shutdown |
-| 3 | CAN-010 | TODO | Implement CANCEL frame sending in gateway | Gateway |
-| 4 | CAN-011 | TODO | Wire HttpContext.RequestAborted to CANCEL | Gateway |
-| 5 | CAN-012 | TODO | Implement timeout-triggered CANCEL | Gateway |
-| 6 | CAN-013 | TODO | Implement payload-limit-triggered CANCEL | Gateway |
-| 7 | CAN-014 | TODO | Implement shutdown-triggered CANCEL for in-flight | Gateway |
-| 8 | CAN-020 | TODO | Stop forwarding REQUEST_STREAM_DATA after CANCEL | Gateway |
-| 9 | CAN-021 | TODO | Ignore late RESPONSE frames for cancelled requests | Gateway |
-| 10 | CAN-022 | TODO | Log cancelled requests with reason | Gateway |
-| 11 | CAN-030 | TODO | Implement inflight request tracking in SDK | Microservice |
-| 12 | CAN-031 | TODO | Create ConcurrentDictionary<Guid, CancellationTokenSource> | Microservice |
-| 13 | CAN-032 | TODO | Add handler task to tracking map | Microservice |
-| 14 | CAN-033 | TODO | Implement CANCEL frame processing | Microservice |
-| 15 | CAN-034 | TODO | Call cts.Cancel() on CANCEL frame | Microservice |
-| 16 | CAN-035 | TODO | Remove from tracking when handler completes | Microservice |
-| 17 | CAN-040 | TODO | Implement connection-close cancellation | Microservice |
-| 18 | CAN-041 | TODO | Cancel all inflight on connection loss | Microservice |
-| 19 | CAN-050 | TODO | Pass CancellationToken to handler interfaces | Microservice |
-| 20 | CAN-051 | TODO | Document cancellation best practices for handlers | Docs |
-| 21 | CAN-060 | TODO | Write integration tests: client disconnect → handler cancelled | |
-| 22 | CAN-061 | TODO | Write integration tests: timeout → handler cancelled | |
-| 23 | CAN-062 | TODO | Write tests: late response ignored | |
+| 1 | CAN-001 | DONE | Define CancelPayload with Reason code | Common |
+| 2 | CAN-002 | DONE | Define cancel reason constants | ClientDisconnected, Timeout, PayloadLimitExceeded, Shutdown |
+| 3 | CAN-010 | DONE | Implement CANCEL frame sending in gateway | Gateway |
+| 4 | CAN-011 | DONE | Wire HttpContext.RequestAborted to CANCEL | Gateway |
+| 5 | CAN-012 | DONE | Implement timeout-triggered CANCEL | Gateway |
+| 6 | CAN-013 | DONE | Implement payload-limit-triggered CANCEL | Gateway |
+| 7 | CAN-014 | DONE | Implement shutdown-triggered CANCEL for in-flight | Gateway |
+| 8 | CAN-020 | DONE | Stop forwarding REQUEST_STREAM_DATA after CANCEL | Gateway |
+| 9 | CAN-021 | DONE | Ignore late RESPONSE frames for cancelled requests | Gateway |
+| 10 | CAN-022 | DONE | Log cancelled requests with reason | Gateway |
+| 11 | CAN-030 | DONE | Implement inflight request tracking in SDK | Microservice |
+| 12 | CAN-031 | DONE | Create ConcurrentDictionary<Guid, CancellationTokenSource> | Microservice |
+| 13 | CAN-032 | DONE | Add handler task to tracking map | Microservice |
+| 14 | CAN-033 | DONE | Implement CANCEL frame processing | Microservice |
+| 15 | CAN-034 | DONE | Call cts.Cancel() on CANCEL frame | Microservice |
+| 16 | CAN-035 | DONE | Remove from tracking when handler completes | Microservice |
+| 17 | CAN-040 | DONE | Implement connection-close cancellation | Microservice |
+| 18 | CAN-041 | DONE | Cancel all inflight on connection loss | Microservice |
+| 19 | CAN-050 | DONE | Pass CancellationToken to handler interfaces | Microservice |
+| 20 | CAN-051 | DONE | Document cancellation best practices for handlers | Docs |
+| 21 | CAN-060 | DONE | Write integration tests: client disconnect → handler cancelled | |
+| 22 | CAN-061 | DONE | Write integration tests: timeout → handler cancelled | |
+| 23 | CAN-062 | DONE | Write tests: late response ignored | |
 
 ## CancelPayload
 
@@ -208,19 +208,19 @@ public class ProcessDataEndpoint : IStellaEndpoint<DataRequest, DataResponse>
 ## Exit Criteria
 
 Before marking this sprint DONE:
-1. [ ] CANCEL frames sent on client disconnect
-2. [ ] CANCEL frames sent on timeout
-3. [ ] SDK tracks inflight requests with CTS
-4. [ ] SDK cancels handlers on CANCEL frame
-5. [ ] Connection close cancels all inflight
-6. [ ] Late responses are ignored/logged
-7. [ ] Integration tests verify cancellation flow
+1. [x] CANCEL frames sent on client disconnect
+2. [x] CANCEL frames sent on timeout
+3. [x] SDK tracks inflight requests with CTS
+4. [x] SDK cancels handlers on CANCEL frame
+5. [x] Connection close cancels all inflight
+6. [x] Late responses are ignored/logged
+7. [x] Integration tests verify cancellation flow
 
 ## Execution Log
 
 | Date (UTC) | Update | Owner |
 |------------|--------|-------|
-| | | |
+| 2025-12-05 | Sprint DONE - CancelReasons defined, InflightRequestTracker implemented, Gateway sends CANCEL on disconnect/timeout, SDK handles CANCEL frames, 67 tests pass | Claude |
 
 ## Decisions & Risks