feat: adds information_schema cluster_info table (#3832)

* feat: adds server running mode to KvBackendCatalogManager

* feat: adds MetaClient to KvBackendCatalogManager

* feat: impl information_schema.cluster_info table

* fix: forgot files

* test: update information_schema result

* feat: adds start_time and uptime to cluster_info

* chore: tweak cargo and comment

* feat: rename greptime_region_peers to region_peers

* fix: cluster_info result

* chore: simplify sqlness commands

* chore: set peer_id to -1 for frontends

* fix: move cluster_info to greptime catalog

* chore: use official proto

* feat: adds active_time

* chore: apply suggestion

Co-authored-by: Jeremyhi <jiachun_feng@proton.me>

* chore: STANDALONE for runtime_metrics

---------

Co-authored-by: Jeremyhi <jiachun_feng@proton.me>
Co-authored-by: tison <wander4096@gmail.com>

src/datanode/Cargo.toml

@@ -30,6 +30,7 @@ common-recordbatch.workspace = true
 common-runtime.workspace = true
 common-telemetry.workspace = true
 common-time.workspace = true
+common-version.workspace = true
 common-wal.workspace = true
 dashmap.workspace = true
 datafusion.workspace = true

src/datanode/src/heartbeat.rs

@@ -16,7 +16,7 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
 
-use api::v1::meta::{HeartbeatRequest, Peer, RegionRole, RegionStat, Role};
+use api::v1::meta::{HeartbeatRequest, NodeInfo, Peer, RegionRole, RegionStat, Role};
 use common_grpc::channel_manager::{ChannelConfig, ChannelManager};
 use common_meta::distributed_time_constants::META_KEEP_ALIVE_INTERVAL_SECS;
 use common_meta::heartbeat::handler::parse_mailbox_message::ParseMailboxMessageHandler;
@@ -43,6 +43,7 @@ use crate::region_server::RegionServer;
 pub(crate) mod handler;
 pub(crate) mod task_tracker;
 
+/// The datanode heartbeat task which sending `[HeartbeatRequest]` to Metasrv periodically in background.
 pub struct HeartbeatTask {
     node_id: u64,
     node_epoch: u64,
@@ -246,6 +247,7 @@ impl HeartbeatTask {
                         }
                     }
                     _ = &mut sleep => {
+                        let build_info = common_version::build_info();
                         let region_stats = Self::load_region_stats(&region_server_clone).await;
                         let now = Instant::now();
                         let duration_since_epoch = (now - epoch).as_millis() as u64;
@@ -254,6 +256,12 @@ impl HeartbeatTask {
                             region_stats,
                             duration_since_epoch,
                             node_epoch,
+                            info: Some(NodeInfo {
+                                version: build_info.version.to_string(),
+                                git_commit: build_info.commit_short.to_string(),
+                                // The start timestamp is the same as node_epoch currently.
+                                start_time_ms: node_epoch,
+                            }),
                             ..Default::default()
                         };
                         sleep.as_mut().reset(now + Duration::from_millis(interval));