fix(template): replace click.confirm with input() to avoid ^M on Linux terminals

click.confirm() doesn't strip \r — "y\r" doesn't match "y" and the prompt
loops or fails. Replace with raw input().strip().rstrip('\r').lower() which
handles both \n and \r\n line endings.

Also add --recreate-snapshot flag to skip the interactive prompt entirely
(useful for scripted re-provisioning).

Update snapshot_exists_skip/recreate tests to monkeypatch builtins.input
instead of using CliRunner input=.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ci_orchestrator/commands/template.py

@@ -366,6 +366,8 @@ def _run_with_heartbeat(
               help="Store build-user credentials in the system keyring after provisioning.")
 @click.option("--credential-target", default="BuildVMGuest", show_default=True,
               help="Keyring target name for the stored credential.")
+@click.option("--recreate-snapshot", is_flag=True,
+              help="Delete and recreate the snapshot if it already exists (no prompt).")
 def template_prepare_win(
     vmx: str,
     guest_ip: str,
@@ -382,6 +384,7 @@ def template_prepare_win(
     auth: str,
     store_credential: bool,
     credential_target: str,
+    recreate_snapshot: bool,
 ) -> None:
     """Provision a Windows template VM via pypsrp (Linux-host compatible).
 
@@ -665,7 +668,12 @@ Register-ScheduledTask -TaskName 'CI-StaticIp' `
     existing = backend.list_snapshots(handle)
     if snapshot in existing:
         click.echo(f"[prepare-win] Snapshot '{snapshot}' already exists.")
-        if not click.confirm(f"Delete and recreate '{snapshot}'?", default=False):
+        if recreate_snapshot:
+            do_recreate = True
+        else:
+            raw = input(f"[prepare-win] Delete and recreate '{snapshot}'? [y/N] ")
+            do_recreate = raw.strip().rstrip("\r").lower() in ("y", "yes")
+        if not do_recreate:
             click.echo("[prepare-win] Keeping existing snapshot. Provisioning complete.")
             return
         click.echo(f"[prepare-win] Deleting snapshot '{snapshot}' ...")