Einstein Audit for Faster‑Than‑Light Hidden Sectors (FTL‑only): J‑First SR Envelope, Testability Gate, and A2 Real‑Data Scaffolding

This release is a **methods upgrade** to the "Einstein Audit" (FTL-only): a quantitative constraint framework that audits hypothetical superluminal hidden sectors against (i) SR causality risk, (ii) cosmological energy budget (ΔN_eff), and (iii) GW consistency (PTA + ringdown). ## What's new in v1.2.01) **Model-aware SR upgrade ("J-first")** - The causality channel is expressed primarily through the SR severity functional **J[ρ] = ⟨P(β,W)^2⟩** (exact paradox wedge + paradox strength), rather than only through the small‑FTL proxy ε_FTL². 2) **Einstein “Testability Gate” / bound-existence condition** - In SR-saturating models (W→∞), J approaches a ceiling **J_max = E[β^4]** set by relativistic mixing. - A finite bound exists only if ΔN_eff exceeds a threshold: **ΔN_eff^thr = x_max / (20 J_max)**, where **x_max = sqrt(1 - y^2 - z^2)** and y=1-PCI, z=ε_pooled/σ_ε. 3) **A2 real-data pipeline scaffolding** - Adds scripts + templates to replace placeholder/demo anchors with **posterior-level** PTA and ringdown inputs, propagate uncertainty into x_max, and report credible bands for J_bound(ΔN_eff) and ΔN_eff^thr. 4) **Covariance-weighted upgrade** - Adds starter tooling for χ²-like Einstein tension **T_E = X^T C^{-1} X**, to be used once real joint posteriors/covariances are available. ## Scope & claims- Scope is **FTL-only** (no higher-dimensional content).- Some example numbers remain **REALDATA_APPROX placeholders** until replaced with real posteriors.- This release **does not claim evidence** for FTL; it provides a reproducible auditing / constraint framework. ## Files (high level)- Technical paper + supplements (PDF)- SR “testability gate” notes (PDFs)- A2 scripts/templates for replacing placeholders with real PTA + ringdown posteriors (Python)- README + changelog ## How to citeZenodo mints a DOI per version and a Concept DOI for all versions; cite the specific version DOI for reproducibility, or the Concept DOI to cite the latest version. Note: Some filenames/notes use internal “v1.3” labeling for the J‑first upgrade; the Zenodo archival release version is v1.2.0. The SR envelope implied by D_E \le 1 is J \le J_{\rm bound}(\Delta N_{\rm eff}) = x_{\max}/(20\Delta N_{\rm eff}), with x_{\max}=\sqrt{1-y^2-z^2}.