Merge relay.ngit.dev migration: bug fixes and migration tooling

This merge includes critical bug fixes and comprehensive migration tooling
developed during the relay.ngit.dev migration effort.

Bug Fixes:
- Fix git protocol error handling to return HTTP 200 with ERR pkt-line
- Fix naughty list false positives and DNS failure identification
- Fix database query filters in load_existing_events (remove .since())
- Fix OID fetch tracking to distinguish 0 OIDs from successful fetches
- Fix purgatory event source tracking for filtered expiry logging
- Implement OID retry logic for 'not our ref' errors

Migration Tools & Documentation:
- Complete 5-phase migration analysis pipeline with orchestration script
- Phase 1: Event fetching from source relay
- Phase 2: Git sync verification
- Phase 3: Categorization and relay comparison
- Phase 4: Log extraction (parse failures, purgatory expiry)
- Phase 5: Action classification for migration decisions
- Comprehensive migration guide with lessons learned
- Troubleshooting guide for permission and corruption issues

Configuration:
- Add NGIT_LOG_LEVEL configuration option
- Update git throttle limits to 60/minute
- Improve logging throughout for better observability

1 files changed, 3 insertions, 0 deletions

diff --git a/src/sync/mod.rs b/src/sync/mod.rs
index bc8c428..d6634ff 100644
--- a/src/sync/mod.rs
+++ b/src/sync/mod.rs
@@ -584,6 +584,7 @@ impl SyncManager {
     /// * `config` - Configuration for sync settings
     /// * `data_path` - Path to git data directory (for persistence)
     /// * `sync_metrics` - Optional pre-registered SyncMetrics (passed from Metrics if metrics are enabled)
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         bootstrap_relay_url: Option<String>,
         service_domain: String,
@@ -1442,6 +1443,7 @@ impl SyncManager {
             self.service_domain.clone(),
             Arc::clone(&self.repo_sync_index),
             action_tx,
+            self.database.clone(),
         );
         let subscriber_shutdown = shutdown_tx.subscribe();
         tokio::spawn(async move { self_subscriber.run(Some(subscriber_shutdown)).await });
@@ -2811,6 +2813,7 @@ impl SyncManager {
                                     event_id = %event.id,
                                     kind = %event.kind.as_u16(),
                                     identifier = %identifier,
+                                    pubkey = %event.pubkey,
                                     "Added rejected announcement to two-tier index"
                                 );
                             }