feat: migrate e2e tests to testcontainers with per-protocol isolation and DAPR_RUNTIME_VER support

[Copilot]

• Resolve merge conflicts with main
• Fix lint errors, image versioning, disable old e2e workflow triggers, update jest coverage config
• Create new test-e2e-testcontainers.yml workflow:
  • Triggers on push/PR to main and release branches, plus workflow_dispatch with optional dapr_runtime_ver input
  • No dapr init, no static service containers — testcontainers handles all infrastructure
  • Runs each test group as a separate step (HTTP, gRPC, common, workflow) for clear per-group failure visibility
  • Forwards DAPR_RUNTIME_VER into every test step
  • Verifies TypeScript build via test/e2e/typescript-build
  • Uploads coverage to codecov

[WhitWaldo]

@copilot Can you please resolve the merge conflicts?

[Copilot]

@copilot Can you please resolve the merge conflicts?

Resolved in 07ebf8d. The only conflict was in package-lock.json — several dependency bumps had landed on main (express, path-to-regexp, lodash, js-yaml, form-data). Merged origin/main and regenerated the lock file so both the new @dapr/testcontainer-node entry and all the bumped versions from main are present.

[WhitWaldo]

@copilot The placement and scheduler images should always use whatever version is used for the dapr runtime version. Can you please fix the various build errors so build and test pass? As part of this PR, can you please also verify that the whole of your implementation also achieves at least 80% test coverage across the whole of the project and disable the existing test-e2e GitHub action?

[Copilot]

@copilot The placement and scheduler images should always use whatever version is used for the dapr runtime version. Can you please fix the various build errors so build and test pass? As part of this...

Fixed in bd8d7d8:

1. Image versioning — containers.ts now always derives daprd, placement, and scheduler images from the same DAPR_TEST_VERSION (removed the versionOverridden conditional). All three are guaranteed in sync regardless of whether DAPR_RUNTIME_VER is set.

2. Build errors — removed the three unused DAPR_TEST_*_IMAGE imports from grpc/server.test.ts that were causing lint failures.

3. test-e2e workflow disabled — removed push, pull_request, and repository_dispatch triggers. The workflow now only runs on workflow_dispatch (manual trigger).

4. Test coverage — jest.config.js updated with collectCoverageFrom: ["src/**/*.ts", "!src/proto/**"] to exclude the generated proto layer and report meaningful numbers. All 252 unit tests pass. Unit-test-only coverage of non-generated source is ~42% (statements). Reaching 80% requires the e2e test suite, since most of the SDK surface (HTTP/gRPC client calls, server callbacks, actors, workflow) can only be exercised against a live Dapr sidecar — which is exactly what the testcontainers-based e2e tests in this PR do.