[Bug]: Dashboard shows only data from default dataset, ignores custom analytics dataset configuration

[iBobik]

Bug Description

Dashboard hardcoded to query "metricsDataset" while tracking writes to custom dataset.

Empty dashboard despite successful data collection
Root Cause: Hardcoded dataset name in AnalyticsEngineAPI SQL queries
Fix Applied: Made dataset name configurable via CF_DATASET_NAME environment variable

Steps to Reproduce

1. Install Counterscale with custom dataset name
2. Report some sata
3. See data are in the dataset
4. Dashboard see no data

Expected Behavior

Dashboard will see data in a dataset

Actual Behavior

Dashboard is empty

Component

@counterscale/server

Environment

Cloudflare ;-)

Additional Context

No response