Migrate to standard NIP-01 't' tags for audit events

- Changed from custom single-letter tags (g, r, c) to standard 't' tags
- Tag values now use descriptive prefixes:
  - 'grasp-audit-test-event' (marker tag)
  - 'audit-{run-id}' (run identification)
  - 'audit-cleanup-after-{timestamp}' (cleanup time)
- Updated audit_tags() in src/audit.rs
- Updated query filtering in src/client.rs
- Updated all tests to verify 't' tag usage
- All tests passing: 12/12 unit tests, 1/1 integration test
- CLI verified working with new tag scheme

This follows standard Nostr conventions and avoids potential
conflicts with other uses of single-letter tags. The 't' tag
is specifically designed for categorization/topics per NIP-01.

1 files changed, 4 insertions, 9 deletions

diff --git a/grasp-audit/src/client.rs b/grasp-audit/src/client.rs
index d78b33c..4831d3f 100644
--- a/grasp-audit/src/client.rs
+++ b/grasp-audit/src/client.rs
@@ -95,16 +95,11 @@ impl AuditClient {
         
         if self.config.mode == AuditMode::CI {
             // In CI mode, only see our own audit events
-            // Filter by "g" tag (grasp-audit marker) and "r" tag (run ID)
+            // Filter by "t" tags (hashtags)
+            let t_tag = SingleLetterTag::lowercase(Alphabet::T);
             filter = filter
-                .custom_tag(
-                    SingleLetterTag::lowercase(Alphabet::G),
-                    "grasp-audit"
-                )
-                .custom_tag(
-                    SingleLetterTag::lowercase(Alphabet::R),
-                    &self.config.run_id
-                );
+                .custom_tag(t_tag, "grasp-audit-test-event")
+                .custom_tag(t_tag, format!("audit-{}", self.config.run_id));
         }
         // In Production mode, see all events (no filter modification)