test: significantly improve test coverage across docker packages

Coverage improvements:
- template: 76.3% → 92.6% (+16.3%)
- builder: 84.8% → 91.2% (+6.4%)
- patterns: 52.1% → 92.6% (+40.5%)
- docker main: 67.0% → 80.1% (+13.1%)

Key changes:
- Added comprehensive validation tests for Container, Script, and HTTP templates
- Added tests for HTTP options (headers, auto-remove, follow-redirect, insecure, env)
- Added builder option tests (WithCleanup, WithGlobalTimeout, WithGlobalAutoRemove)
- Added test for AddExitHandlerInput method
- Removed `//go:build !integration` tag from output_extraction_test.go to enable
  combined unit+integration coverage (output extraction functions now 56-86% covered)

Three packages now exceed the 85% coverage target.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

feat(docker): add WorkflowBuilder with CI/CD patterns and extensive t…

…ests

- Introduced `WorkflowBuilder` for creating Docker workflows (single, pipeline, and parallel).
- Added comprehensive CI/CD workflow patterns in `docker/patterns` (build-test-deploy, health check, multi-environment deploy).
- Implemented `docker/template` for reusable container configurations with fluent options.
- Included extensive unit tests (`builder_test.go`) for `WorkflowBuilder` (pipeline, parallel, exit handlers, etc.).
- Coverage includes all major builder operations, chaining, and error scenarios.

chore(test): add integration tests for Docker with Temporal workflows…

… and update dependencies

- Introduce new integration tests (`TestIntegration_ContainerWithEnvironment`, `TestIntegration_ContainerWithWorkDir`, etc.) for enhanced Docker + Temporal workflow validation.
- Update dependencies in `go.mod` and `go.sum` for improved compatibility and functionality.
- Remove unused `go.opentelemetry.io/otel/exporters/stdout/stdoutlog` dependency.

chore(docker): remove unused worker integration test and update depen…

…dencies

- Remove `worker_integration_test.go` as worker registration is already validated in other integration tests.
- Update dependencies in `go.mod` and `go.sum`, including adding `testcontainers` for improved test support.
- Adjust Temporal container setup in `integration_test.go` to use `temporalio/temporal:latest` with updated configurations for better compatibility and testing.