Fix/missing resolute in charm config validation

docs/changelog.md

@@ -1,6 +1,10 @@
 
 <!-- vale Canonical.007-Headings-sentence-case = NO -->
 
+## [#206 Add resolute image support]
+
+* Add resolute image support.
+
 ## [#198 Update integration tests](https://github.com/canonical/github-runner-image-builder-operator/pull/198) (2026-02-17)
 * Update integration tests that were intentionally not done in #185.
 

src/state.py

@@ -137,11 +137,13 @@ class BaseImage(str, Enum):
         FOCAL: The focal ubuntu LTS image.
         JAMMY: The jammy ubuntu LTS image.
         NOBLE: The noble ubuntu LTS image.
+        RESOLUTE: The resolute ubuntu LTS image.
     """
 
     FOCAL = "focal"
     JAMMY = "jammy"
     NOBLE = "noble"
+    RESOLUTE = "resolute"
 
     def __str__(self) -> str:
         """Interpolate to string value.