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* fix(obs): isolate process sampler windows Refs rustfs/backlog#1004 Refs rustfs/backlog#986 - add a reusable ProcessSampler so callers can own independent sysinfo refresh windows - wire separate sampler instances for obs metrics scheduling and memory observability - keep compatibility helpers while avoiding cross-task CPU and disk delta interference Co-Authored-By: heihutu <[email protected]> * fix(obs): import process sampler bundle helper Refs rustfs/backlog#1004 Refs rustfs/backlog#986 - import collect_process_metric_bundle_with in the metrics scheduler - drop the stale collect_process_metric_bundle import after switching scheduler sampling to independent process samplers Co-Authored-By: heihutu <[email protected]> * fix(obs): move process sampler into blocking task Refs rustfs/backlog#1004 Refs rustfs/backlog#986 - move the memory observability process sampler into the spawn_blocking closure - satisfy the closure static lifetime required by tokio while keeping the isolated sampler design intact Co-Authored-By: heihutu <[email protected]> --------- Co-authored-by: heihutu <[email protected]>