fix: Make the Parquet Sink properly phase aware

[coastalwhite]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 202 lines in your changes missing coverage. Please review.

Project coverage is 79.70%. Comparing base (5e280d9) to head (990b80a).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-stream/src/nodes/io_sinks/mod.rs	0.00%	91 Missing ⚠️
crates/polars-stream/src/nodes/io_sinks/parquet.rs	0.00%	87 Missing ⚠️
crates/polars-stream/src/nodes/mod.rs	0.00%	13 Missing ⚠️
crates/polars-stream/src/nodes/io_sinks/csv.rs	0.00%	4 Missing ⚠️
crates/polars-stream/src/nodes/io_sinks/json.rs	0.00%	4 Missing ⚠️
crates/polars-stream/src/nodes/io_sinks/ipc.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21499      +/-   ##
==========================================
- Coverage   79.98%   79.70%   -0.28%     
==========================================
  Files        1598     1605       +7     
  Lines      229320   230127     +807     
  Branches     2623     2623              
==========================================
+ Hits       183412   183426      +14     
- Misses      45303    46096     +793     
  Partials      605      605              

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