Altinity / clickhouse-backup / 29506160242

69%

push

github

isolate concurrent CI runs on shared real buckets via GITHUB_RUN_ID

Three concurrent Test (1.26, 25.8) jobs (master push + PR runs) shared the
same remote path backup/{cluster}/{shard}/{version} and deleted each other's
fixed-name test_rebase_gcs_* backups mid-test, see
https://github.com/Altinity/clickhouse-backup/actions/runs/29487098583/job/87610918468

- append GITHUB_RUN_ID to the {version} macro (writeMacrosVersionXML), so
  every integration config path/object_disk_path is unique per workflow run
- testflows: storage_prefix includes GITHUB_RUN_ID (pid is not unique
  across runners)
- disk_cos endpoint gets ${HOSTNAME} like disk_gcs already had
- ReadBackupMetadataRemote returns an explicit error for Broken backups
  instead of an empty BackupMetadata that produced the confusing
  "required backup ... has data_format=" error

4 of 6 new or added lines in 1 file covered. (66.67%)

16358 of 23947 relevant lines covered (68.31%)

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