v0.1.7: collapse flat-rate zones to one option; add DL capture script

- Start-session: when the single-estimate fallback finds the same price at the
  min and max duration (a flat-rate zone like DL), show ONE option — "$X flat,
  parked until <end>" — instead of a wall of identical-price rungs. No reason to
  offer shorter durations when the price doesn't change.
- capture-dl.mjs: dumps the DL zone's live requests+responses (tokens redacted)
  to ~/Downloads/dl-capture/ for a durable record.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/app.json

@@ -3,14 +3,14 @@
     "name": "BigBrainParking",
     "slug": "bigbrainparking",
     "scheme": "bigbrainparking",
-    "version": "0.1.6",
+    "version": "0.1.7",
     "orientation": "portrait",
     "userInterfaceStyle": "automatic",
     "newArchEnabled": true,
     "icon": "./assets/icon.png",
     "android": {
       "package": "top.mowden.bigbrainparking",
-      "versionCode": 6,
+      "versionCode": 7,
       "edgeToEdgeEnabled": true,
       "adaptiveIcon": {
         "foregroundImage": "./assets/adaptive-icon.png",