FIX: Ensure Column Names are Strings (bluesky#1177)

* FIX: ensure column names are strings

* MNT: changelog

Author: genematx

CHANGELOG.md

@@ -4,6 +4,13 @@ Write the date in place of the "Unreleased" in the case a new version is release
 # Changelog
 
 
+## Unreleased
+
+### Fixed
+
+- Column names in `TableStructure` are explicitly converted to strings.
+
+
 ## v0.1.6 (2025-09-29)
 
 ### Fixed

tiled/structures/table.py

@@ -24,6 +24,7 @@ class TableStructure:
     resizable: Union[bool, Tuple[bool, ...]] = False
 
     def __post_init__(self):
+        self.columns = list(map(str, self.columns))  # Ensure all column names are str
         for column in self.columns:
             if column.startswith("_"):
                 raise ValueError(