chore: Bump schema package to 1.0.4-dev

Author: effigies

src/schema/SCHEMA_VERSION

@@ -1 +1 @@
-1.0.3
+1.0.4-dev

tools/schemacode/pyproject.toml

@@ -47,7 +47,7 @@ parallel = true
 # uvx bump-my-version bump <patch|minor|major>
 # git push upstream <current-branch>
 [tool.bumpversion]
-current_version = "1.0.3"
+current_version = "1.0.4-dev"
 parse = """(?x)
     (?P<major>[0-9]+)
     \\.(?P<minor>[0-9]+)