feat: script and overlay for generating files for the sake of testing…

[tonsV2]

$ docker compose -f docker-compose.yml -f overlays/docker-compose.fill-storage.yml up

$ make backup-file-storage
...
2025/09/21 00:58:06 INFO  : generated_files/t4_file_995.bin: Copied (new)
2025/09/21 00:58:06 INFO  : generated_files/t4_file_997.bin: Copied (new)
2025/09/21 00:58:06 INFO  : generated_files/t4_file_999.bin: Copied (new)
2025/09/21 00:58:06 INFO  : generated_files/t4_file_998.bin: Copied (new)
2025/09/21 00:58:06 INFO  : generated_files/t4_file_996.bin: Copied (new)
2025/09/21 00:58:06 INFO  : icon: Set directory modification time (using SetModTime)
2025/09/21 00:58:06 INFO  : generated_files: Set directory modification time (using SetModTime)
2025/09/21 00:58:06 INFO  : 
Transferred:   	   50.002 GiB / 50.002 GiB, 100%, 743.345 MiB/s, ETA 0s
Transferred:        21353 / 21353, 100%
Elapsed time:       1m2.0s

File storage backup completed successfully

$ make restore-file-storage
...
2025/09/21 02:24:04 INFO  : generated_files/t5_file_989.bin: Copied (new)
2025/09/21 02:24:04 INFO  : generated_files/t5_file_999.bin: Copied (new)
2025/09/21 02:24:04 INFO  : generated_files/t5_file_997.bin: Copied (new)
2025/09/21 02:24:04 INFO  : icon: Set directory modification time (using SetModTime)
2025/09/21 02:24:04 INFO  : generated_files: Set directory modification time (using SetModTime)
2025/09/21 02:24:04 INFO  : 
Transferred:   	   50.002 GiB / 50.002 GiB, 100%, 942.112 MiB/s, ETA 0s
Transferred:        21353 / 21353, 100%
Elapsed time:        56.2s

File storage restore completed successfully