fix: remove committed dist, fix AzDO doc copy-paste, merge redundant test

- Remove github-action/dist/ from tracking (upstream compiles in CI per PR #210)
- Fix "GitHub Actions Runner" -> "Azure Pipelines agent" in azure-devops-task.md
- Merge redundant "returns true" test into the existing happy-path test

Author: tgenov

common/__tests__/platform.test.ts

@@ -35,20 +35,11 @@ describe('mergeMultiPlatformImages', () => {
 			.mockResolvedValue(true);
 		const log = jest.fn();
 
-		await mergeMultiPlatformImages('img', ['v1', 'latest'], 'linux-amd64,linux-arm64', createFn, log);
+		const result = await mergeMultiPlatformImages('img', ['v1', 'latest'], 'linux-amd64,linux-arm64', createFn, log);
 
 		expect(createFn).toHaveBeenCalledTimes(2);
 		expect(createFn).toHaveBeenNthCalledWith(1, 'img', 'v1', ['linux-amd64', 'linux-arm64']);
 		expect(createFn).toHaveBeenNthCalledWith(2, 'img', 'latest', ['linux-amd64', 'linux-arm64']);
-	});
-
-	test('returns true when all createFn calls succeed', async () => {
-		const createFn = jest.fn<Promise<boolean>, [string, string, string[]]>()
-			.mockResolvedValue(true);
-		const log = jest.fn();
-
-		const result = await mergeMultiPlatformImages('img', ['v1', 'latest'], 'linux-amd64,linux-arm64', createFn, log);
-
 		expect(result).toBe(true);
 	});
 

docs/azure-devops-task.md

@@ -83,7 +83,7 @@ In the example above, the devcontainer-build-run will perform the following step
 | cacheFrom                 | false    | Specify additional images to use for build caching                                                                                                                                                                                                               |
 | noCache                   | false    | Builds the image with `--no-cache` (takes precedence over `cacheFrom`)                                                                                                                                                                                           |
 | cacheTo                 | false    | Specify the image to cache the built image to                                                                                                                                                                                                               |
-| platform                  | false    | Platforms for which the image should be built. If omitted, defaults to the platform of the GitHub Actions Runner. Multiple platforms should be comma separated. Ignored when `platformTag` is set (matrix mode).                                                |
+| platform                  | false    | Platforms for which the image should be built. If omitted, defaults to the platform of the Azure Pipelines agent. Multiple platforms should be comma separated. Ignored when `platformTag` is set (matrix mode).                                                |
 | platformTag               | false    | Tag suffix for this platform build (e.g., `linux-amd64`). In matrix builds, this controls which per-platform image is built and tagged; when set, `platform` is ignored. Used to push per-platform images that are later merged into a multi-arch manifest.      |
 | mergeTag                  | false    | Comma-separated list of platform tags to merge into a multi-arch manifest (e.g., `linux-amd64,linux-arm64`). When set, the task skips building an image and instead merges previously built `platformTag` images in the merge job after matrix builds complete. |