release(v1.7.12-alpha): bump on top of working-OTA 1.7.11

Version-only bump. Sits above v1.7.11-alpha which user has verified
runs the full Install Update pipeline end-to-end (check → download
→ install → auto-restart). Freshly-installed nodes from the 1.7.11
ISO will see 1.7.12 as their first OTA target.

Frontend tarball byte-identical to v1.7.11 (same sha).

Artefacts:
  archipelago                                      247f65c2…54f40df9  40385472
  archipelago-frontend-1.7.12-alpha.tar.gz         0644a436…54f58    76983846 (reused)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/Cargo.lock

@@ -80,7 +80,7 @@ checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
 
 [[package]]
 name = "archipelago"
-version = "1.7.11-alpha"
+version = "1.7.12-alpha"
 dependencies = [
  "anyhow",
  "archipelago-container",

core/archipelago/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "archipelago"
-version = "1.7.11-alpha"
+version = "1.7.12-alpha"
 edition = "2021"
 description = "Archipelago Bitcoin Node OS - Native backend"
 authors = ["Archipelago Team"]

releases/manifest.json

@@ -1,23 +1,23 @@
 {
-  "version": "1.7.11-alpha",
+  "version": "1.7.12-alpha",
   "release_date": "2026-04-20",
   "changelog": [
-    "OTA proof release — first version where Install Update should run clean from the UI with no manual steps. Click it and watch the sidebar flip to 1.7.11-alpha on its own."
+    "Nothing new — version bump so freshly-installed nodes (from the 1.7.11 ISO) have something to OTA down, confirming the end-to-end update pipeline out of the box."
   ],
   "components": [
     {
       "name": "archipelago",
-      "current_version": "1.7.10-alpha",
-      "new_version": "1.7.11-alpha",
-      "download_url": "https://git.tx1138.com/lfg2025/archy/raw/branch/main/releases/v1.7.11-alpha/archipelago",
-      "sha256": "cf003f622a0848b24b85c1034e08acda6abcb0123b5595c51b5a80040f65465f",
-      "size_bytes": 40378752
+      "current_version": "1.7.11-alpha",
+      "new_version": "1.7.12-alpha",
+      "download_url": "https://git.tx1138.com/lfg2025/archy/raw/branch/main/releases/v1.7.12-alpha/archipelago",
+      "sha256": "247f65c2e649332ed67e82faff0d71727f0e272863c2daf4504a5cd954f40df9",
+      "size_bytes": 40385472
     },
     {
-      "name": "archipelago-frontend-1.7.11-alpha.tar.gz",
-      "current_version": "1.7.10-alpha",
-      "new_version": "1.7.11-alpha",
-      "download_url": "https://git.tx1138.com/lfg2025/archy/raw/branch/main/releases/v1.7.11-alpha/archipelago-frontend-1.7.11-alpha.tar.gz",
+      "name": "archipelago-frontend-1.7.12-alpha.tar.gz",
+      "current_version": "1.7.11-alpha",
+      "new_version": "1.7.12-alpha",
+      "download_url": "https://git.tx1138.com/lfg2025/archy/raw/branch/main/releases/v1.7.12-alpha/archipelago-frontend-1.7.12-alpha.tar.gz",
       "sha256": "0644a43611309031efbb9b235a3602f0828f709fcaec0047543d96e1cbd54f58",
       "size_bytes": 76983846
     }