semi implemented and features implemented save checkpoint

docs/features/unchecked/releaseorchestrator/docker-compose-deployment-agent.md

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+# Docker Compose Deployment Agent
+
+## Module
+ReleaseOrchestrator
+
+## Status
+IMPLEMENTED
+
+## Description
+Compose agent capability for docker-compose stack management: pull, up, down, scale, health-check operations. Includes compose file management with digest-locked image references.
+
+## Implementation Details
+- **Modules**: `src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/`
+- **Key Classes**:
+  - `ComposeCapability` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/ComposeCapability.cs`) - `IAgentCapability` implementation for Compose stack management
+  - `ComposeExecutor` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/ComposeExecutor.cs`) - executes docker-compose commands
+  - `ComposeFileManager` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/ComposeFileManager.cs`) - manages compose files with digest-locked references
+  - `ComposePullTask` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/Tasks/ComposePullTask.cs`) - pulls images for compose stack
+  - `ComposeUpTask` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/Tasks/ComposeUpTask.cs`) - brings up compose stack
+  - `ComposeDownTask` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/Tasks/ComposeDownTask.cs`) - tears down compose stack
+  - `ComposeScaleTask` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/Tasks/ComposeScaleTask.cs`) - scales compose services
+  - `ComposeHealthCheckTask` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/Tasks/ComposeHealthCheckTask.cs`) - health check for compose services
+  - `ComposePsTask` (`src/ReleaseOrchestrator/__Agents/StellaOps.Agent.Compose/Tasks/ComposePsTask.cs`) - lists compose service status
+- **Interfaces**: `IComposeTask`, `IAgentCapability`
+- **Source**: SPRINT_20260110_108_003_AGENTS_compose.md
+
+## E2E Test Plan
+- [ ] Pull images via `ComposePullTask` and verify all images are pulled
+- [ ] Bring up a compose stack via `ComposeUpTask` and verify all services are running
+- [ ] Scale a service via `ComposeScaleTask` and verify the desired replica count
+- [ ] Health check via `ComposeHealthCheckTask` and verify service health status
+- [ ] Tear down via `ComposeDownTask` and verify all services are stopped