refactor(oid): reset analysis to claim-free core

Archive superseded studies and payload metadata while preserving a tested Schlegel LR/LE implementation with explicit scientific and physics contracts.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/OID_analysis/archive/legacy_oid_v1/ARCHIVE_INDEX.md

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+# Legacy OID v1 archive
+
+Archived on 2026-07-22 to prevent unverified results from being confused with the two-scene trusted baseline.
+
+## Status
+
+This directory is historical, read-only, and non-executable. Do not run its scripts, import its modules, or use its numerical claims in a paper. The old pipeline used index-based field subtraction, leaky decomposition fitting, ambiguous signed mode overlap, and a cross-covariance SVD labelled as Schlegel OID without implementing Schlegel et al.'s LR-OID or LE-OID pseudoinverse construction.
+
+## Contents
+
+- `analysis/`: old seven-phase CPU analysis and figure generation.
+- `scripts/`: old GPU collection/replay scripts. They are retained only for provenance and must not be run as the trusted pipeline.
+- `data_derived/`: generated v1 products and figures. Source raw data remain in the original immutable `data/` tree.
+- `documents/`: old conclusions, pipeline descriptions, and result tables.
+- `li22b/`: historical Li22b reproduction scripts. The associated `data_li22b/` tree remains separately marked archive/read-only because the large flow fields have already been removed.
+
+## Archive-only warning
+
+Nothing in this archive is an active workflow or supported entrypoint. Do not run archived commands or treat archived documents, scripts, or results as current guidance. For the current active scope and recovery state, read `../../README.md`, `../../SCIENTIFIC_RESET.md`, and `../../HANDOFF.md`. For the July historical study record only, see `../studies/2026-07-two-scene-conditional/STATUS.md`; that status is provenance, not an active pipeline.