release 1.3.2: update from Gitea, Linux-only CLI, desktop app for Linux and Windows

The updater reads latest.json from Gitea, built by scripts/make-latest-json.py
against the Gitea API (no gh CLI). Release workflow builds the Linux CLI and
the Linux+Windows desktop app, signs the updater artifacts and attaches
everything to the release.

Needs the repo secrets TAURI_SIGNING_PRIVATE_KEY and
TAURI_SIGNING_PRIVATE_KEY_PASSWORD, which I could not set (secret-store writes
are reserved for the user) - set them from ~/.tauri/guara-updater.key and
.pass before pushing a tag.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Cargo.lock

@@ -416,7 +416,7 @@ dependencies = [
 
 [[package]]
 name = "guara-cli"
-version = "1.3.1"
+version = "1.3.2"
 dependencies = [
  "clap",
  "ctrlc",
@@ -429,7 +429,7 @@ dependencies = [
 
 [[package]]
 name = "guara-core"
-version = "1.3.1"
+version = "1.3.2"
 dependencies = [
  "aes",
  "argon2",