Add ducklake_static_backup #429
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Example, you can attach a given ducklake in read/write mode like:
```sql
ATTACH 'ducklake:postgres:<CONNECTION_STRING>' AS my_ducklake (DATA_PATH 's3://some_bucket', STATIC_BACKUP 's3://some_bucket/backup.ducklake');
--- some operations
CALL ducklake_static_backup('my_ducklake');
--- this will copy metadata to s3://some_bucket/backup.ducklake
```
And at the same time, a fully static backup will be accessible like:
```sql
ATTACH 'ducklake:s3://some_bucket/backup.ducklake' (READ_ONLY);
```
(note that backup will be up to date to the most recent `ducklake_static_backup` call that happened BEFORE attaching it)
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Example, you can attach a given ducklake in read/write mode like:
And at the same time, a fully static read-only backup will be accessible like:
(note that backup will be up to date to the most recent
ducklake_static_backupcall that happened BEFORE attaching it)