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Zhengchao An
5fbd49a800
backlog#1052 S3, third slice — the hard blocker for a second embedded server's service stage. GLOBAL_BUCKET_METADATA_SYS was a process-global OnceLock whose init ran .set().unwrap(): a second instance's service startup panicked the whole process. The system it guards is inherently per-store (it holds the store handle and that store's bucket→metadata cache), so it now lives on the store's own InstanceContext: - init_bucket_metadata_sys writes the cell of the store it was handed (api.ctx) — no signature change — and keeps the double-init fail-fast, now scoped to the instance (assert on the per-context set). The dist-erasure check for the refresh loop reads the same context. - get_global_bucket_metadata_sys / the crate-private getter behind the ~20 get_*_config helpers resolve through the current_ctx() facade — the published store's context, or bootstrap before that — so every existing reader keeps its exact single-instance behavior. - New acceptance test: two real stores in one process each initialize their own metadata system (the old global cell panicked right there), plus a shared builder extracted from the store-graph test. 201 bucket/metadata regression tests green.