docs: fix typos in ADR and auth documentation

[olitreadwell]

What changed

• Corrected spelling errors across 10 ADR and auth documentation files (e.g. contraints, libaray, succeded, accesible, unnecassary, posibility, visualzation, publically, compatibiliy, definitly, wit, woudl, neglible, cacheing, Discusssion, itselfs, tennant, interfer, menues).
• Single-token spelling fixes only, no rewording, refactor, or formatting changes.

Why

• Self-found gap from a documentation scan of the ADR and auth docs.

How to verify

git fetch https://github.com/olitreadwell/boxtribute.git fix-typos-in-docs
git checkout FETCH_HEAD

Docs-only change; git diff HEAD^ HEAD shows only the corrected words, no functional code change.

[pylipp]

thanks a lot 🙏