Add incremental backup support

[dudanogueira]

Exposes Weaviate's file-based incremental backups (server v1.37.0+) in the client:

const base = await client.backup.create({
  backupId: 'base-backup',
  backend: 'filesystem',
  waitForCompletion: true,
});

await client.backup.create({
  backupId: 'incremental-backup',
  backend: 'filesystem',
  incrementalBaseBackupId: base.id, // or any existing backup ID string
  waitForCompletion: true,
});

Changes

• incrementalBaseBackupId on client.backup.create() and collection.backup.create(), plus .withIncrementalBaseBackupId() on the v2 builder.
• Gated client-side by DbVersionSupport.supportsIncrementalBackups() — throws WeaviateUnsupportedFeatureError below 1.37.0, matching the Python client.
• Validates that the base ID differs from the backup being created (the server otherwise returns a bare 500), and lowercases it.
• The base backup ID is read back on getCreateStatus() and list(). Weaviate only returns it to root users, so it may be undefined even for an incremental backup.

Notes for reviewers

• backup(connection) now takes dbVersionSupport as a second argument (same for backupCollection). Both are internal factories — only types are re-exported publicly.
• list() no longer returns the raw payload verbatim: incremental_base_backup_id is mapped to incrementalBaseBackupId. Everything else is passed through unchanged.

Testing

Mock tests cover the request payload, lowercasing, the version gate (1.36 vs 1.37) and response parsing. Integration tests create an incremental backup on top of a base backup and restore it — verified against Weaviate 1.38.0.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Gc9nJTnKeYs41fidZAYWf6

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca