Remove fake historical data from ScalingCard chart

[skoeva]

The ScalingCard component displays a chart with historical scaling metrics (replicas and CPU over time), but the data is entirely simulated using Math.random(). Meanwhile, the ScalingTab component fetches real data from Prometheus using queryPrometheus and getPrometheusEndpoint.

Options

1. Remove the chart from ScalingCard

Pros

• No misleading fake data
• Simpler code, less maintenance burden
• The ScalingMetrics component already shows current replicas, CPU, HPA, etc.
• Users who need historical data can just use the ScalingTab

Cons

• Card might look sparse/incomplete visually
• Users must navigate to a different tab for this data

2. Integrate real Prometheus data into ScalingCard

Pros

• Chart shows actual historical data
• Consistent UX between card and tab

Cons

• Requires additional dependencies
• Need to fetch namespace instance and extract labels, more complex code
• ScalingCard is meant to be a summary view (this might be overkill)

3. Show a place holder instead of a fake chart

Pros

• No misleading data
• Keeps the card simple

Cons

• Takes up space without providing much value
• May look unfinished