Group multiple same-day releases into single news items

- Releases from same repo on same day are now grouped
- Single release: "app v1.0.0 uitgebracht"
- Multiple: "app: 3 releases (v1.0 → v1.2)" with all versions listed
- Reduced from 279 to 222 news items (175→117 release entries)
- Y-app 14 apr: 10 releases → 1 grouped item

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: DutchSailor

data/history/2026-04-15.json

@@ -1,13 +1,13 @@
 {
-  "totalRepos": 110,
+  "totalRepos": 111,
   "publicRepos": 68,
-  "privateRepos": 42,
+  "privateRepos": 43,
   "totalStars": 255,
   "totalForks": 45,
-  "totalOpenIssues": 169,
-  "totalSizeKB": 11638231,
-  "estimatedLinesOfCode": 20642275,
-  "totalCommits": 4518,
+  "totalOpenIssues": 170,
+  "totalSizeKB": 11638459,
+  "estimatedLinesOfCode": 20647975,
+  "totalCommits": 4545,
   "uniqueContributors": 32,
   "languages": 9
 }