plusplusjiajia opened a new pull request, #288:
URL: https://github.com/apache/paimon-rust/pull/288

   ### Purpose
   Add `Catalog::list_partitions` and `list_partitions_paged` for catalogs that 
track partitions via metastore (e.g. `RESTCatalog`). Mirrors Java
     
[`Catalog`](https://github.com/apache/paimon/blob/release-1.4/paimon-core/src/main/java/org/apache/paimon/catalog/Catalog.java)
 interface and
     
[`AbstractCatalog`](https://github.com/apache/paimon/blob/release-1.4/paimon-core/src/main/java/org/apache/paimon/catalog/AbstractCatalog.java)
 default impl.
   
     - **spec**: new `Partition` struct (11 fields, JSON wire-format compatible 
with Java)
     - **api**: `RESTApi::list_partitions[_paged]` + `ListPartitionsResponse` + 
`partitions(db,t)` URL builder
     - **catalog**: trait gains `list_partitions[_paged]` with default impls 
(return empty / single full page)
     - **catalog/rest**: `RESTCatalog` overrides both, swallowing 
`NotImplemented` so callers can fall back to scanning manifest entries


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