ci: release chain — shared workflows, semver wording, source-only goreleaser, version stamping

version.go

@@ -0,0 +1,15 @@
+package traefikllmgateway
+
+// pluginVersion is the released version of this plugin. It is stamped at
+// release time by ./workflow-prepare.sh (invoked by the shared go-release
+// workflow before GoReleaser builds and tags), which rewrites the string
+// below to the computed semver.
+//
+// Traefik runs this plugin under Yaegi, where the version cannot be
+// resolved from build info at runtime (debug.ReadBuildInfo sees Traefik's
+// build graph, not the interpreted plugin). This build-stamped constant is
+// therefore the single source of truth for the version surfaced read-only
+// in GET /admin/api/overview (spec §4, v0.2). Local/dev/test builds carry
+// the "0.0.0-dev" sentinel below, since nothing has stamped them. Not read
+// from anywhere else in the package.
+const pluginVersion = "0.0.0-dev"