[jmacd867]

Closes #257

Summary

push to any branch, or a PR ─► meson-build.yml
                                  build plugin (Meson) + relay (cargo build --release)
                                  upload artifacts: plugin/PilotDataSync.xpl, relay/relay.exe

push tag v*      ─► release.yml ─► build: calls meson-build.yml (workflow_call)
                                   publish: tag push only, contents: write
                                     gh release create <tag> PilotDataSync.xpl relay.exe

manual run       ─► release.yml ─► build only (dry run, never publishes, even on a tag ref)

 .github/workflows/
 ├── meson-build.yml   # + relay build, + artifact uploads, + workflow_call, push on branches only
+└── release.yml       # v* tag publishes the release; manual run is a dry run
 relay/
+└── .cargo/config.toml  # static C runtime: relay.exe needs no VC++ redistributable
 README.md               # + "Download the built files"
 AGENTS.md               # lists release.yml

Evidence

• Before: DLLs imported by relay.exe from cargo build --release (objdump):
  VCRUNTIME140.dll, api-ms-win-crt-{math,runtime,string,stdio,locale,heap}-l1-1-0.dll, so the lab PC needs the VC++ redistributable.
  After: DLLs imported by the CI-built relay.exe from this branch's run: Windows system DLLs only (kernel32, user32, gdi32, ws2_32, opengl32, d3dcompiler_47, …), and nothing from the VC++ redistributable.
• The CI-built PilotDataSync.xpl imports XPLM_64.dll (from X-Plane), OPENGL32, KERNEL32, ntdll and the Universal CRT (api-ms-win-crt-*), which ships with Windows 10 and 11. It doesn't need the VC++ redistributable either.
• The branch's CI run built both files and uploaded them as the plugin and relay artifacts.
• Static checks: actionlint is clean, and yamllint finds nothing new. cd relay && cargo test passes 25 tests.

Not verified:

• release.yml itself. GitHub only allows a manual run of a workflow that is on main, so the dry run can happen only after merge (Actions → Release → Run workflow).
• relay.exe on a PC without the redistributable, and the CI-built plugin loading in X-Plane, both need the lab PCs. The README carries a note until someone confirms.

Merge Danger

Door: two-way

Nothing is published until someone pushes a v* tag. Merge #275 first, then tag, so the first release's plugin includes the flight-loop fix. Deleting a bad release and its tag undoes it.

Blast Radius: CI

meson-build.yml now also builds the relay, so each run takes longer, and its job is renamed "Build the plugin and relay on Windows" (no branch protection rule requires the old name). Tag pushes no longer trigger meson-build.yml directly; release.yml builds them instead.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Phlabry]

LGTM. relay/.cargo/config.toml is found from the working directory, not the manifest, so cargo build --manifest-path relay/Cargo.toml from the repo root drops the static CRT. CI sets working-directory, so it's fine there.