Gridline 0.8.1 — door and native plot corrections

Gridline 0.8.1 — qualified limited source/guidance release.

• Correct rotated door swing arcs and nonplot room lines across PDF openings.
• Add explicit receiving-room intent while preserving reviewed legacy swings and validating supplied associations.
• Correct native paper-space plotting to 1:1 millimetres and reject contradictory standard-scale overrides.

Validation: 177 local tests, zero skips; exact-main Linux/Windows CI; fresh scoped AutoCAD open/AUDIT/plot/DWG/DXF acceptance and Blender native/GLB readback with 11 corruption rejections. Real isolated Claude/Codex install/reinstall and Gemini update/rollback checks pass. PRs #44 and #46 merged.

Source: 0e87aa52922b164235ccf277edead851b9acc000. Both ZIP publisher attestations verified against the fixed main/workflow/source policy. The separate release-qualification.json binds source, immutable candidate hashes, live CI/signatures and owner approval. That statement was recorded by the agent under explicit owner ship authority; it is not independent human/professional review. The candidate manifest intentionally remains its historical UNQUALIFIED_CANDIDATE build receipt; final publication authority is the separate qualified receipt.

Compatibility remains limited: conceptual 3D doors are closed slabs; native font/superscript substitutions and native-PDF parser limits are documented. No architectural/code certification, universal native interoperability, public Plugin Directory approval, or guaranteed automatic delivery is claimed. Local rule adoption, licensed book access/B14 and roadmap acceptance gaps remain tracked; #43 remains partial for project-professional acceptance. See docs/RELEASE_0_8_1_QUALIFICATION.md in the source. Provider updates are opt-in/manual as supported.

Verify SHA256SUMS and RELEASE_SHA256SUMS plus publisher attestations before installation. Historical releases/tags remain unchanged.