refactor: dedup clean uid

utils/hash_userid.py

@@ -0,0 +1,11 @@
+from sys import argv
+import polars as pl
+import polars_hash as pl_hash
+
+file = argv[1]
+
+pl.scan_parquet(file).with_columns(
+    pl.col("user_id").cast(pl.String).add("Lt2N5xgjJOqRsT5qVt7wWYw6SqOPZDI7")
+).with_columns(
+    pl_hash.col("user_id").chash.sha2_256().str.head(16)
+).collect().write_parquet(file.replace(".parquet", "_pub.parquet"))