feat: improve maintainers detection [CM-1033]

scripts/services/docker/Dockerfile.git_integration

@@ -82,6 +82,7 @@ FROM base AS runner
 RUN apt-get update && apt-get install -y \
     ca-certificates \
     git \
+    ripgrep \
     --no-install-recommends \
     && rm -rf /var/lib/apt/lists/* \
     && apt-get clean \

services/apps/git_integration/src/crowdgit/models/maintainer_info.py

@@ -34,3 +34,6 @@ class MaintainerResult(BaseModel):
     maintainer_file: str | None = None
     maintainer_info: list[MaintainerInfoItem] | None = None
     total_cost: float = 0
+    candidate_files: list[tuple[str, int]] = []
+    ai_suggested_file: str | None = None
+    not_found: bool = False