feat(smartdb): add operation log APIs, point-in-time revert support, and a web-based debug dashboard

rust/crates/rustdb-commands/src/context.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use bson::Document;
 use dashmap::DashMap;
 use rustdb_index::IndexEngine;
-use rustdb_storage::StorageAdapter;
+use rustdb_storage::{OpLog, StorageAdapter};
 use rustdb_txn::{SessionEngine, TransactionEngine};
 
 /// Shared command execution context, passed to all handlers.
@@ -20,6 +20,8 @@ pub struct CommandContext {
     pub cursors: Arc<DashMap<i64, CursorState>>,
     /// Server start time (for uptime reporting).
     pub start_time: std::time::Instant,
+    /// Operation log for point-in-time replay.
+    pub oplog: Arc<OpLog>,
 }
 
 /// State of an open cursor from a find or aggregate command.