[I] [RFC-112] Support Hudi materialized-view flows and repeated refreshes [hudi]

["danny0405 (via GitHub)" <gi...@apache.org>]

danny0405 opened a new issue, #20405:
URL: https://github.com/apache/hudi/issues/20405

   ### Task Description
   
   Implement and validate CREATE MATERIALIZED VIEW ... USING hudi through the existing catalog and batch writer.
   
   Follow the RFC's Spark 4.1 sequence: create/load target; for refresh, publish an empty insert_overwrite_table truncate commit, reconcile catalog metadata, then write the recomputed result with bulk_insert or insert through append-mode saveAsTable. Do not reinterpret every append as an overwrite or claim atomicity across the entire sequence.
   
   Use the existing shared fixes for catalog creation/reconciliation and existing-table append routing. Provide a runnable SQL example and expected outputs.
   
   ### Acceptance criteria
   
   - [ ] Initial materialization and repeated refresh succeed for managed and external targets.
   - [ ] Refresh output exactly matches recomputation, including rows removed since the prior run and a zero-row result.
   - [ ] Tests cover partitioned/unpartitioned targets, unchanged definitions, supported additive schema changes, and identity-change rejection.
   - [ ] Timeline assertions distinguish truncate replace commits from result writes.
   - [ ] Inject failures before/after truncate and during reconciliation/write; document the empty window and lack of cross-step rollback.
   - [ ] All scenarios run through the CLI/Connect harness.
   
   ### Task Type
   
   Code improvement/refactoring
   
   ### Related Issues
   
   Parent feature issue: #20401
   RFC: #19997 (under review; implementation must follow the agreed contract).
   Dependencies for end-to-end acceptance: #20402, #20404, #20369, #20371.
   


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