Drop support for Python 3.10, require Python 3.11+

Python 3.11 is now the minimum supported version. This aligns with
the codebase's use of StrEnum (introduced in 3.11) and removes
compatibility shims that were only needed for older versions.

.github/workflows/build.yml

@@ -22,11 +22,11 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14"]
         include:
           - os: ubuntu-22.04
             tesseract_ppa: "ppa"
-            python: "3.10"
+            python: "3.11"
 
     env:
       OS: ${{ matrix.os }}
@@ -102,7 +102,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14"]
 
     env:
       OS: ${{ matrix.os }}
@@ -165,7 +165,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14"]
 
     env:
       OS: ${{ matrix.os }}