test: disable GPG signing in all test helpers

Prevent GPG signing prompts (including Yubikey activation) during test runs
by explicitly disabling commit.gpgsign and tag.gpgsign in all test repository
creation helpers.

Modified:
- tests/common/purgatory_helpers.rs: create_test_repo_with_commit()
- src/git/mod.rs: create_test_repo_with_commit()
- src/purgatory/helpers.rs: create_test_repo_with_commit()

All test repositories now have GPG signing disabled regardless of global
git configuration.

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/common/purgatory_helpers.rs b/tests/common/purgatory_helpers.rs
index fa1be73..125f485 100644
--- a/tests/common/purgatory_helpers.rs
+++ b/tests/common/purgatory_helpers.rs
@@ -51,6 +51,10 @@ pub fn create_test_repo_with_commit(path: &Path, variant: CommitVariant) -> Resu
     // Configure git user for commits
     run_git(path, &["config", "user.email", "test@example.com"])?;
     run_git(path, &["config", "user.name", "Test User"])?;
+    
+    // Disable GPG signing for tests (prevents yubikey prompts)
+    run_git(path, &["config", "commit.gpgsign", "false"])?;
+    run_git(path, &["config", "tag.gpgsign", "false"])?;
 
     // Create a file based on variant
     let (filename, content) = match variant {