fix: update root pyproject.toml gds-framework lower bound to >=0.2.3

## Problem

Root `pyproject.toml` line 28 declares `gds-framework>=0.2.0`, but all downstream packages require `>=0.2.3`. This creates a version gap where the root meta-package could technically resolve gds-framework 0.2.0–0.2.2, which are incompatible with all dependents.

## Fix

Change line 28 from:
```toml
"gds-framework>=0.2.0",
```
to:
```toml
"gds-framework>=0.2.3",
```