release: bump to v1.1 (versionCode 2) + record store billing public keys

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

android/BILLING_KEYS.md

@@ -0,0 +1,31 @@
+# In‑app billing public keys (RSA)
+
+These are the **public** RSA keys issued by each store, used to verify the
+signature of a purchase payload. They are not secret. Keep them with the app so
+the native billing layer (and/or server signature verification) can reference
+them.
+
+## Cafe Bazaar
+Used by the Poolakey / on‑device verification path (the current Bazaar flow uses
+the `bazaar://in_app` deep‑link + server token verification, so this key is only
+needed if/when on‑device signature verification is added).
+
+```
+MIHNMA0GCSqGSIb3DQEBAQUAA4G7ADCBtwKBrwCQ6/F2F0yNSXULayEDzFPSse07K7q70pcxZrE+lzKyw8N4vx3yZKqj/rrYbe1JvS9iYDZy3q5G3x5tdi45Ggjer5uP1EP3oq/liONVcLXU206PTe0AfWQtruvA045iPn9aRv3ZaZBz9dniSA8rrX53+YxgGiENC9TShQ3uItQe12utsUcHO5Xj0av+ZufWkL5w/Mr1dQLlvHY8QT+R2uYv8sLBgcgOc9E8BKnOIO0CAwEAAQ==
+```
+
+## Myket
+Required by the (to‑be‑built) native Myket billing plugin to verify the
+`INAPP_DATA_SIGNATURE` of each purchase before crediting coins.
+
+```
+MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCbUBKRU4g1AQrbOO8GkcBn79ol0hbs5PZVd5vPP6za98BTc9leqvyGE+DwSg7lbsXTZxCzPRBS3m0qB9LShe70WG+RQapG9Q2lodszYkauicPkJSpbXWh/nfrziTWNqEHqUfCsC4+lkKSEkxDNa1Po7uZzbwaJ+Kf1+d8wSWYpxwIDAQAB
+```
+
+## In‑app product SKUs (both stores)
+| SKU | Coins | Price |
+|-----|-------|-------|
+| Coin5K  | 5,000  | 99,000 تومان |
+| Coin12K | 12,000 | 199,000 تومان |
+| Coin28K | 28,000 | 399,000 تومان |
+| Coin65K | 65,000 | 799,000 تومان |

android/app/build.gradle

@@ -16,8 +16,8 @@ android {
         applicationId "com.bargevasat.app"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 1
-        versionName "1.0"
+        versionCode 2
+        versionName "1.1"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
              // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.