[Planning] SLA-Based Escalation via ICM

## Epic: SLA-Based Escalation via ICM

### Description
Introduce ICM as a targeted escalation path triggered only after an SLA breach, define the escalation contract (trigger criteria, required metadata, ownership), and ensure GitHub remains the system of record.

### Objective
Create the initial plan for the **SLA-Based Escalation via ICM** epic. This includes:
- Defining scope and success criteria
- Identifying key deliverables and milestones
- Mapping dependencies and risks
- Proposing an implementation approach
- Identifying stakeholders and owners