feat: add a subcommand to bench scan (#7722)

* feat: support scan bench

Signed-off-by: evenyag <realevenyag@gmail.com>

* feat: support projection by name

Signed-off-by: evenyag <realevenyag@gmail.com>

* feat: support force flat format

Signed-off-by: evenyag <realevenyag@gmail.com>

* feat: spawn tasks to poll streams

Signed-off-by: evenyag <realevenyag@gmail.com>

* feat: support filter config

Signed-off-by: evenyag <realevenyag@gmail.com>

* feat: scan bench support wal

Signed-off-by: evenyag <realevenyag@gmail.com>

* chore: support not providing provider in wal

Signed-off-by: evenyag <realevenyag@gmail.com>

* fix: skip wal replay

Signed-off-by: evenyag <realevenyag@gmail.com>

* refactor: wrap EngineComponents

Signed-off-by: evenyag <realevenyag@gmail.com>

* docs: add scanbench doc

Signed-off-by: evenyag <realevenyag@gmail.com>

* chore: change --skip-wal-replay to --enable-wal

Signed-off-by: evenyag <realevenyag@gmail.com>

* chore: remove limit from config

Signed-off-by: evenyag <realevenyag@gmail.com>

---------

Signed-off-by: evenyag <realevenyag@gmail.com>

src/store-api/src/storage/requests.rs

@@ -124,6 +124,8 @@ pub struct ScanRequest {
     /// Optional hint for KNN vector search. When set, the scan should use
     /// vector index to find the k nearest neighbors.
     pub vector_search: Option<VectorSearchRequest>,
+    /// Whether to force reading region data in flat format.
+    pub force_flat_format: bool,
 }
 
 impl Display for ScanRequest {
@@ -206,6 +208,14 @@ impl Display for ScanRequest {
                 vector_search.metric
             )?;
         }
+        if self.force_flat_format {
+            write!(
+                f,
+                "{}force_flat_format: {}",
+                delimiter.as_str(),
+                self.force_flat_format
+            )?;
+        }
         write!(f, " }}")
     }
 }
@@ -259,5 +269,14 @@ mod tests {
             request.to_string(),
             "ScanRequest { projection: [1, 2], limit: 10 }"
         );
+
+        let request = ScanRequest {
+            force_flat_format: true,
+            ..Default::default()
+        };
+        assert_eq!(
+            request.to_string(),
+            "ScanRequest { force_flat_format: true }"
+        );
     }
 }