Support fetch tiflash system table and compact table through grpc service

[JaySon-Huang]

Fetch tiflash system table

-- fetch tiflash system table
./bin/tiflash-ctl dispatch exec_sql --pd 10.2.12.81:6580 --flash 10.2.12.81:9580 --sql 'select table_id,total_stable_size,total_stable_size_on_disk,round(avg_stable_rows,0),round(avg_stable_size,0),segment_count,delta_index_size,total_pack_count_in_delta,delta_cache_size,total_delta_rows,total_delta_size,delta_count,round(avg_delta_rows,0),round(avg_delta_size,0) from system.dt_tables order by total_stable_size_on_disk desc limit 100' --decimal 0
table_id,total_stable_size,total_stable_size_on_disk,"round(avg_stable_rows, 0)","round(avg_stable_size, 0)",segment_count,delta_index_size,total_pack_count_in_delta,delta_cache_size,total_delta_rows,total_delta_size,delta_count,"round(avg_delta_rows, 0)","round(avg_delta_size, 0)"
243,64949902442,44976036865,909091,393635772,165,76038408,1957,4897636,3094288,1339832273,165,18753,8120196
233,31045642277,22710964961,681818,470388519,66,134112,683,4264909,588318,408923253,66,8914,6195807
241,43035474905,16127717610,777024,73817281,583,25933560,1175,9335365,1131777,107518815,226,5008,475747
235,3575467823,1091313746,853605,67461657,53,1384440,24,0,55002,4675170,1,55002,4675170
239,2627724568,569782475,924604,53627032,49,0,0,0,0,0,0,NULL,NULL
237,398617499,62370125,916362,26574500,15,8244680,181,46690,332445,9640905,15,22163,642727
245,10800645,7356523,100000,10800645,1,0,0,0,0,0,0,NULL,NULL
231,2519021,1254261,15000,2519021,1,0,0,0,0,0,0,NULL,NULL
229,238308,128365,1500,238308,1,0,0,0,0,0,0,NULL,NULL
102,390,351,13,390,1,0,0,0,0,0,0,NULL,NULL
92,0,0,NULL,NULL,0,0,0,0,0,0,0,NULL,NULL
259,0,0,NULL,NULL,1,2032,1,0,25,3334,1,25,3334
261,0,0,NULL,NULL,1,2032,1,0,5,584,1,5,584
263,0,0,NULL,NULL,1,2032,1,0,10000,1975466,1,10000,1975466

Compact a given table_id

./bin/tiflash-ctl dispatch compact --pd 10.2.12.81:6580 --flash 10.2.12.81:9580 --table_id 239 --start_key 30088000000001ed6988
[2025/06/24 22:20:03.782 +08:00] [INFO] [client.go:311] ["[pd] create pd client with endpoints and keyspace"] [pd-address="[10.2.12.81:6580]"] [keyspace-id=0]
[2025/06/24 22:20:03.786 +08:00] [INFO] [pd_service_discovery.go:543] ["[pd] switch leader"] [new-leader=http://10.2.12.81:6580] [old-leader=]
[2025/06/24 22:20:03.786 +08:00] [INFO] [pd_service_discovery.go:175] ["[pd] init cluster id"] [cluster-id=7516814964136016887]
[2025/06/24 22:20:03.786 +08:00] [INFO] [client.go:386] ["[pd] changing service mode"] [old-mode=UNKNOWN_SVC_MODE] [new-mode=PD_SVC_MODE]
[2025/06/24 22:20:03.787 +08:00] [INFO] [tso_client.go:230] ["[tso] switch dc tso allocator serving address"] [dc-location=global] [new-address=http://10.2.12.81:6580]
[2025/06/24 22:20:03.787 +08:00] [INFO] [tso_dispatcher.go:290] ["[tso] tso dispatcher created"] [dc-location=global]
[2025/06/24 22:20:03.787 +08:00] [INFO] [client.go:428] ["[pd] service mode changed"] [old-mode=PD_SVC_MODE] [new-mode=PD_SVC_MODE]
[2025/06/24 22:20:03.789 +08:00] [INFO] [dispatch.go:351] ["Compact TiFlash table"] [physical_table_id=239] [store=10.2.12.81:9580] [start_key=30088000000001ed6988]
[2025/06/24 22:20:29.556 +08:00] [INFO] [dispatch.go:379] ["Compact finished"] [physical_table_id=239]
[2025/06/24 22:20:29.556 +08:00] [INFO] [dispatch.go:400] ["Compact command finished"] [physical_table_id=239] [success=true] [key=30088000000001ed6988]