fix: promote auth 0.7.1 and yank 0.7.0

[Jess Sullivan (Jesssullivan)]

Summary

• register corrected tummycrypt_tinyland_auth@0.7.1 from its signed immutable release
• yank 0.7.0, whose non-root TypeScript 6 extension request conflicts with the coordinated first-party TypeScript 5.9.3 graph
• preserve every shipped version directory unchanged

Supply-chain evidence

• source commit: 17650d218508dfcbceab134266fe8cb5640e4f97
• annotated tag v0.7.1: GitHub signature valid
• immutable release: https://github.com/tinyland-inc/tinyland-auth/releases/tag/v0.7.1
• independently recomputed archive SRI: sha256-MrIDmjlSpVdkNRRTkZ9NJr4S64qYUPNA/VF7Kynu7+I=

Validation

• registry validator: 169 source entries
• immutable-version gate
• release MODULE byte-for-byte comparison
• mixed auth 0.7.1 + invitation 0.2.5 bazel mod graph against this local registry
• git diff --check

Supersedes bazel-registry #94 for consumers. Tracks TIN-2647 and TIN-2783.