fix: Force student risk probability to Polars < 1.40

The dagster-iceberg I/O manager uses the `polars.scan_iceberg` call, which defaults
to the polars native implementation in >=1.40. This leads to thread deadlocks in
deployed Dagster environments which prevents the run from finalizing, keeping a
concurrency slot frozen. This forces to < 1.40 until the bug gets fixed in Polars and/or dagster-iceberg.

Author: blarghmatey

dg_projects/b2b_organization/uv.lock

@@ -12,6 +12,7 @@ dependencies = [
     "httpx ~= 0.28.0",
     "scikit-learn>=1.2.2",
     "ol-orchestrate-lib",
+    "polars<1.40",
 ]
 
 [project.entry-points]