Bump to (latest) `polars`, the `0.20.6x` series B)

Since I was trying out the neat lookin `polars-fuzzy-match` (also added
for now as a core dep here) which requires the new plugin sys, plus it's
about time we synced with upstream!

Adjust some column syntax to the new `.name` sub-field-space and the
`uv` lock-file to match.

Other,
- add back `trio-typing` bc i guess something else needs it (debug
  tooling stuff in new `tractor`?)
- flip back to the `tractor` pre-main pin since the new `main`-branch
  requires new `trio` stuff we haven't ported yet..

piker/tsp/_anal.py

@@ -517,7 +517,7 @@ def with_dts(
 
     '''
     return df.with_columns([
-        pl.col(time_col).shift(1).suffix('_prev'),
+        pl.col(time_col).shift(1).name.suffix('_prev'),
         pl.col(time_col).diff().alias('s_diff'),
         pl.from_epoch(pl.col(time_col)).alias('dt'),
     ]).with_columns([
@@ -623,7 +623,7 @@ def detect_vlm_gaps(
 
 ) -> pl.DataFrame:
 
-    vnull: pl.DataFrame = w_dts.filter(
+    vnull: pl.DataFrame = df.filter(
         pl.col(col) == 0
     )
     return vnull