feat(federation): Matrix spec compliance improvements with Complement test coverage

.github/PR_BODY.md

@@ -2,33 +2,45 @@ Branch: complement/homerunner-portbinding
 
 Summary
 -------
-This draft branch was created to collect and push diagnostic changes relating to Complement / Homerunner port binding and local federation test failures.
+This branch contains Matrix Specification compliance improvements for federation endpoints, comprehensive unit tests, CI/CD enhancements, and diagnostic documentation for Complement testing.
 
 What this branch contains
 ------------------------
-- A diagnostic test log: `complement-TestGetMissingEventsGapFilling.txt` (captured test output from a Complement run). This log shows the homeserver starting and Complement attempting to fetch the server public key from the host via host.docker.internal on an ephemeral port (for example, `host.docker.internal:42739`), with repeated connection failures and timeouts.
 
-What this branch does NOT contain
---------------------------------
-- No persistent source-code changes to the main server codebase. Any small experimental edits previously performed were reverted on request; the repository should contain only diagnostic artifacts.
+### Source Code Changes
+- **Federation v1 endpoints**: Fixed `get_missing_events` response format to correctly return `pdus` and `origin` fields (commit bf04631)
+- **Federation v2 endpoints**: Enhanced auth chain endpoint with proper Matrix-spec-compliant responses (commit 19c5d39)
+- **Federation user query**: Added profile query endpoint implementation (commit 19c5d39)
+- **Client-server room routes**: Added state event handling and room state endpoints (commit 19c5d39)
+- **MatrixAuth utilities**: Refactored authentication and authorisation logic for better spec compliance (commit 19c5d39)
 
-Context and reasoning
+### Test Coverage (merged from PR #10)
+- `FederationProfileQueryTest.kt`: Unit tests for federation profile queries
+- `FederationV2AuthChainTest.kt`: Comprehensive tests for auth chain endpoint
+- `StateEventRoutesTest.kt`: Tests for client-server state event routes
+- `MissingEventsTest.kt`: Unit tests for the missing events endpoint (A→B→C chain validation)
+
+### CI/CD Improvements
+- Updated `Complement.Dockerfile` to use Debian-slim builder, resolving TLS issues during Gradle dependency fetch (commit 2646d00)
+
+### Documentation
+- `COMPLEMENT_LOCAL_RUN.md`: Comprehensive guide for running Complement tests locally using Docker and WSL
+- Diagnostic test log: `complement-test-output.txt` (captured output from Complement run for reference)
+
+Context and Reasoning
 ---------------------
-- The attached log was captured while running Complement with HOMERUNNER_HS_PORTBINDING_IP=0.0.0.0 to help diagnose container -> host connectivity problems.
-- Containers resolved `host.docker.internal` to the Docker host IP (e.g., `192.168.65.254`), but attempts to connect to the published ephemeral ports repeatedly failed, leading Complement to report inability to fetch public keys and resulting test failures.
-
-Suggested reviewer actions
--------------------------
-- Inspect `complement-TestGetMissingEventsGapFilling.txt` to confirm the exact failed host:port pairs (search for `host.docker.internal` in the log).
-- If desired, run local host diagnostics to verify whether the host is listening on the ephemeral published ports and whether the Docker port publication is reachable from containers. Useful commands (PowerShell):
-  - `Get-NetTCPConnection -LocalPort 42739` or `netstat -an | Select-String 42739`
-  - `docker ps --format "{{.ID}}\t{{.Image}}\t{{.Names}}\t{{.Ports}}"`
-  - `docker port <container-id>`
-  - In WSL: `curl -vk https://host.docker.internal:42739/_matrix/key/v2/server/ed25519:<keyid>`
-
-Notes
------
-- The branch is a draft to keep the diagnostic artifact available without merging into `main`.
-- If you want me to push only non-log changes next, I can re-run the commit steps and explicitly exclude large log files.
+This branch evolved from an initial investigation into Complement/Homerunner port binding issues. During diagnostics, several Matrix Specification compliance gaps were identified and fixed. PR #10 was opened to deliver the test coverage for these fixes and was subsequently merged back into this branch.
+
+The changes ensure:
+- Proper federation endpoint responses matching Matrix Specification v1.16
+- Complete test coverage for federation and client-server endpoints
+- Improved CI/CD reliability for Complement testing
+- Clear documentation for local Complement test workflows
+
+Testing
+-------
+- All new unit tests pass locally
+- Federation endpoints return spec-compliant responses
+- Complement Docker image builds successfully with the updated Dockerfile
 
 Signed-off-by: GitHub Copilot