Debusine: debuginfod server

This project implements a debuginfod-compatible server within Debusine to provide automated debug symbol resolution for Debian developers. Currently, debugging binaries built by Debusine requires manual installation of -dbgsym packages. This project aims to eliminate this manual labor by allowing tools like gdb to fetch symbols automatically via HTTP. Based on an analysis of the elf_classify logic in elfutils, I have designed and prototyped a pipeline that identifies and extracts .debug ELF files from -dbgsym.deb packages and parses their Build-IDs. The implementation integrates this extraction into the isolated sbuild worker task. These symbols are then indexed as debian:debug-symbol artifacts and served via a custom Django view that supports the buildid/<id>/debuginfo and executable endpoints, including HTTP Range requests for partial content. Key Deliverables: 1) An isolated extraction pipeline using pyelftools within the sbuild task. 2) A Django-based artifact storage and indexing model (debian:debug-symbol). 3) debuginfod-compliant HTTP endpoints (/debuginfo and /executable) with support for mandatory headers and 206 Partial Content. 4) Documentation and integration tests for gdb symbol resolution.