feat: announcement purgatory

Extends purgatory to hold repository announcements until git data arrives,
preventing empty repositories from being served to clients.

When an announcement is received, a bare repo is created immediately and the
announcement is held in purgatory. It is only promoted and served once a git
push confirms real content exists. If no push arrives before expiry, the bare
repo is deleted and the announcement is silently discarded.

Key behaviours:
- Soft expiry: announcements are hidden from clients but kept alive while git
  pushes are in progress, reviving on successful push
- Expiry is extended when a matching state event or git push is observed
- NIP-09 deletion events remove announcements from purgatory
- Purgatory state (announcements, state events, PR events, expired set) is
  persisted to disk on graceful shutdown and restored on startup, with elapsed
  downtime subtracted from expiry deadlines
- Purgatory announcements drive StateOnly sync in the sync system so state
  events are fetched from listed relays before promotion
- SyncLevel added to RepoSyncIndex to distinguish purgatory repos (StateOnly)
  from promoted repos (Full L2+L3 sync)

1 files changed, 1 insertions, 1 deletions

diff --git a/grasp-audit/src/specs/mod.rs b/grasp-audit/src/specs/mod.rs
index bf711fa..ceae684 100644
--- a/grasp-audit/src/specs/mod.rs
+++ b/grasp-audit/src/specs/mod.rs
@@ -7,5 +7,5 @@ pub mod grasp01;
 // Re-export all test structs from grasp01 module
 pub use grasp01::{
     CorsTests, EventAcceptancePolicyTests, GitCloneTests, GitFilterTests, Nip01SmokeTests,
-    Nip11DocumentTests, PushAuthorizationTests, RepositoryCreationTests,
+    Nip11DocumentTests, PurgatoryTests, PushAuthorizationTests, RepositoryCreationTests,
 };