ralphex installed via go install displays version as unknown

[vwdss]

Minor bug, but persistent across multiple releases.

Version installed with go install github.com/umputun/ralphex/cmd/ralphex@latest:

➜  ralphex git:(master) which ralphex
/Users/username/go/bin/ralphex
➜  ralphex git:(master) ralphex --version
ralphex unknown

Version build from sources:

➜  ralphex git:(master) make build
cd cmd/ralphex && go build -ldflags "-X main.revision=master-e6fe24d-20260210T183548 -s -w" -o ../../.bin/ralphex.master
cp .bin/ralphex.master .bin/ralphex
➜  ralphex git:(master) .bin/ralphex --version
ralphex master-e6fe24d-20260210T183548

Expectations: release installed via go install should output ralphex v0.10.0 where v0.10.0 is currently installed version

[umputun]

go install doesn't run Makefiles or inject ldflags, so the revision variable stays at its default "unknown" value. there's no way to make go install produce exactly the same version string as make build since ldflags injection is a build-time feature.

what I did instead - added a fallback chain using debug.ReadBuildInfo() in #84:

1. ldflags revision (set by make build) - takes priority when available
2. module version - go install @latest or @v0.10.0 sets this to the tag, e.g. v0.10.0
3. VCS commit hash - for local go build without ldflags, shows short hash like abc1234
4. "unknown" - last resort

so after the next release, go install @latest will show ralphex v0.10.1 (or whatever the version is). you'll need to re-run go install to pick up the fix.

[umputun]

fixed in v0.10.1. go install @latest will now show the correct version.