C_obs residual diagnostic and K_eff_v3 candidate-tension audit in a classified SPARC subset

This release provides a reproducible technical package for the C_obs residual diagnostic and K_eff_v3 candidate-tension audit in a classified SPARC subset. The package includes derived C_obs profile tables, K_eff_tail_v3 audit tables, calibrated Monte Carlo outputs, source-closure summaries, claim-boundary documentation, technical reports in English and Italian, reference code, configuration files, manifests, and checksums. The analysis distinguishes four scopes: 1. C_obs derived profiles for 175 SPARC galaxies;2. a classified diagnostic subset of 47 galaxies for K_eff_tail_v3 audit;3. a compact error-propagation pilot;4. a final full numerical Monte Carlo run on three source-cautioned candidate tensions: ESO563-G021, NGC5371, and NGC6195. The three K_eff_v3 cases are full-MC-stable source-cautioned candidate tensions. They are not clean failures and not strong K_eff claims. C_obs is treated as an operational residual diagnostic, not as proof of a new fundamental physical field. K_eff_tail_v3 is treated as a heuristic audit proxy, not as an independently validated physical predictor. Public file-payload correction. The file payload of this v1.5.2 record has been replaced after a post-publication rights/reuse review. Earlier files may have contained PDF materials, nested package contents, source exports, or other provider-sourced materials whose redistribution rights are not sufficiently clear for public reuse. These materials have been removed from the public payload and replaced by a public-safe text/code/metadata package. Third-party data notice. The record license applies only to original CORBS workflow text, metadata, claim-control notes, scripts, and original derived documentation. It does not relicense third-party source data, PDF documents, catalogue exports, screenshots, archive-derived material, or SPARC/Rotmod/source-archive material. Users should obtain provider-sourced data directly from the original services and follow their terms, attribution requirements, and citation guidance. Scientific status. This correction is a public-release hygiene action only. It does not alter the scientific claim. No confirmed dark galaxy, confirmed dark matter detection, resolved H I kinematics, or dark-sector/quantum interpretation is claimed by this file-payload correction. Release version: v1.5.2Reserved DOI: 10.5281/zenodo.20342838Creator ORCID: 0009-0001-8032-7163