v1.5.1: envoi firmware version dans payload UDP (bytes 69-71)

- Lecture fichier VERSION et pack major.minor.patch dans bytes 69-71
- README: documentation complete structure 100 bytes + conso data
- Changelog mis a jour

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

changelog.json

@@ -1,5 +1,21 @@
 {
   "versions": [
+    {
+      "version": "1.5.1",
+      "date": "2026-03-18",
+      "changes": {
+        "features": [
+          "Payload UDP Miotiq: bytes 69-71 firmware version (major.minor.patch)",
+          "README: documentation complete de la structure des 100 bytes UDP"
+        ],
+        "improvements": [],
+        "fixes": [],
+        "compatibility": [
+          "Necessite mise a jour du parser Miotiq pour decoder les bytes 69-71 (firmware version)"
+        ]
+      },
+      "notes": "Le capteur envoie maintenant sa version firmware dans chaque trame UDP. Cote serveur, bytes 69/70/71 = major/minor/patch. Documentation payload complete ajoutee au README."
+    },
     {
       "version": "1.5.0",
       "date": "2026-03-18",