GHSA-CVP8-VVGF-69Q4 obsidian-tc: Default folder ACL is fail-open; .obsidian plugin secrets are readable by default

Impact With a default configuration, an undefined readPaths/writePaths meant allow-all, the strictReadDefault flag was inert, and the .obsidian/.git/.trash control directories were denied only during enumeration — not on the direct request path. A caller could read .obsidian/plugins//data.json,...