fix: refine treemap sizing and add earth bgp collectors

docs/CHANGELOG.md

@@ -7,6 +7,32 @@ This project follows the repository versioning rule:
 - `feature` -> `+0.1.0`
 - `bugfix` -> `+0.0.1`
 
+## 0.21.7
+
+Released: 2026-03-27
+
+### Highlights
+
+- Added Earth-side BGP collector visualization support so anomaly markers and collector stations can be explored together.
+- Refined the collected-data distribution treemap so square tiles better reflect relative volume while staying readable in dense layouts.
+
+### Added
+
+- Added `/api/v1/visualization/geo/bgp-collectors` to expose RIPE RIS collector locations as GeoJSON.
+- Added dedicated Earth collector marker handling and BGP collector detail cards in the Earth runtime.
+- Added collector-specific BGP visual tuning for altitude, opacity, scale, and pulse behavior.
+
+### Improved
+
+- Improved the collected-data distribution treemap with dynamic square-grid sizing, clearer area-based span rules, centered compact tiles, and tooltip coverage on both icons and labels.
+- Improved compact treemap readability by hiding `1x1` labels, reducing `1x1` value font size, and centering icon/value content.
+- Improved Earth BGP interactions so anomaly markers and collector markers can both participate in hover, lock, legend, and info-card flows.
+
+### Fixed
+
+- Fixed Earth BGP data loading gaps by adding the missing `bgp.js` runtime module required by the current control and visualization flow.
+- Fixed treemap layout drift where compact tiles could appear oversized or visually inconsistent with the intended square-grid distribution.
+
 ## 0.21.6
 
 Released: 2026-03-27