refactor(server): source build version from git tag

- Stamp version, channel and vendor into META-INF/build-info.properties
- Read build metadata at runtime from BuildProperties instead of expanded YAML
- Remove app.common placeholders from application.yaml
- Derive the OpenAPI info version from the packaged build version
- Point the OCI image source label at the GitHub repository
- Drop redundant repository blocks from settings.gradle.kts

server/build.gradle.kts

@@ -23,6 +23,22 @@ java {
     }
 }
 
+// Generate META-INF/build-info.properties at build time. The build version comes
+// from the project version (driven by the git tag in CI); channel and vendor are
+// stamped alongside it so the runtime no longer needs template placeholders.
+springBoot {
+    buildInfo {
+        properties {
+            additional.set(
+                mapOf(
+                    "channel" to buildChannel,
+                    "vendor" to vendor
+                )
+            )
+        }
+    }
+}
+
 dependencies {
     // BOMs are imported as platforms, so they cannot be bundled.
     implementation(platform(libs.aws.sdk.bom))
@@ -48,17 +64,6 @@ dependencies {
     testRuntimeOnly(libs.bundles.testRuntime)
 }
 
-tasks.processResources {
-    filesMatching("application.yaml") {
-        println("appVersion = ${artefactVersion}, channel = ${buildChannel}, vendor = ${vendor}")
-        expand(
-            "appVersion" to artefactVersion,
-            "channel" to buildChannel,
-            "vendor" to vendor
-        )
-    }
-}
-
 tasks.test {
     useJUnitPlatform()
 }