Phase 2.2: Value overrides, branch overrides, and quota overrides

[omattsson]

Overview

Per-instance configuration: Helm value overrides, branch overrides, and resource quota overrides.

Commands

Command	Description
override list <instance-id>	List all value overrides
override set <instance-id> <chart-id>	Set values from --file <yaml> or --set key=val
override delete <instance-id> <chart-id>	Remove value override
override branch list <instance-id>	List branch overrides
override branch set <instance-id> <chart-id> <branch>	Set per-chart branch
override branch delete <instance-id> <chart-id>	Remove branch override
override quota get <instance-id>	Get per-instance quota override
override quota set <instance-id>	Set quota override (--cpu-limit, --memory-limit, etc.)
override quota delete <instance-id>	Remove quota override (fall back to cluster default)
stack values <id>	Export merged Helm values as YAML (--chart for specific chart)
stack compare <id1> <id2>	Side-by-side instance comparison

Acceptance Criteria

• Value overrides from a YAML file are applied and visible on next deploy
• Branch overrides work per-chart
• Quota overrides show in override quota get and take effect on deploy
• stack values shows fully merged values

Depends On

• Phase 1.3: Core stack instance lifecycle commands #3

API Endpoints

Method	Path
GET/PUT/DELETE	/api/v1/stack-instances/:id/overrides/:chartId
GET/PUT/DELETE	/api/v1/stack-instances/:id/branches/:chartId
GET/PUT/DELETE	/api/v1/stack-instances/:id/quota-overrides
GET	/api/v1/stack-instances/:id/values
GET	/api/v1/stack-instances/compare?left=&right=