chore(openspec): archive completed changes

- Archive config-secrets (FN-009) - 31 tasks complete
- Archive runfusion-poc (FN-008) - 25 tasks complete
- Archive deployment-config (FN-006) - 27 tasks complete
- All changes moved to openspec/changes/archive/

openspec/changes/archive/2026-05-14-deployment-config/specs/portainer-deployment/spec.md

@@ -0,0 +1,22 @@
+## ADDED Requirements
+
+### Requirement: Stack deploys via Portainer
+The system SHALL provide a Portainer-compatible stack definition.
+
+#### Scenario: Portainer stack file
+- **WHEN** an operator deploys via Portainer
+- **THEN** they can paste the stack definition into Portainer's stack editor
+- **AND** Portainer can pull and deploy all services
+
+#### Scenario: Environment variables in Portainer
+- **WHEN** the stack is deployed via Portainer
+- **THEN** environment variables are configured in Portainer's UI
+- **AND** the stack references these variables
+
+### Requirement: Deployment documentation is complete
+The system SHALL provide operator documentation for deployment.
+
+#### Scenario: Deployment guide
+- **WHEN** an operator reads docs/deployment.md
+- **THEN** they find step-by-step instructions for Portainer deployment
+- **AND** prerequisites and assumptions are clearly stated