chore(complement): diagnostics for homerunner port binding

[EdGeraghty]

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.

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.

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.

Signed-off-by: GitHub Copilot

[EdGeraghty]

@copilot halp plox.

All the info should be in the PR

[Copilot]

@EdGeraghty I've opened a new pull request, #10, to work on those changes. Once the pull request is ready, I'll request review from you.

[EdGeraghty]

@EdGeraghty I've opened a new pull request, #10, to work on those changes. Once the pull request is ready, I'll request review from you.

@copilot I have merged #10 into this PR. Please update the description here based on that merge

[Copilot]

@EdGeraghty I've opened a new pull request, #11, to work on those changes. Once the pull request is ready, I'll request review from you.