🔧 Auto-resolve: Pull rebase failed: fatal: couldn't find remote ref main

Fix: Changed default git_branch from "main" to "master" in config.py
Root cause: Repository uses master branch but service was configured for main

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/auto_commit_service/config.py

@@ -86,7 +86,7 @@ class AutoCommitSettings(BaseServiceSettings):
         description="Git remote to push to",
     )
     git_branch: str = Field(
-        default="main",
+        default="master",
         description="Git branch to push to",
     )