Dynamic Astro routes were reading Netlify redirect config through a cwd-relative path, which is fragile inside a serverless runtime and was taking detail pages down with 500s before render.
Resolve netlify.toml by searching from the module directory and current working directory, and fail open in request-time redirect lookup so a config read problem does not block page rendering.
Constraint: Netlify serverless cwd is not guaranteed to be the repo root
Rejected: Inline redirects into route modules | would duplicate platform config and drift from source of truth
Rejected: Leave redirect lookup hard-failing | one config read failure should not take down unrelated pages
Confidence: medium
Scope-risk: narrow
Reversibility: clean
Directive: Keep redirect config lookup independent of process cwd anywhere server code reads deploy config files
Tested: vitest ./test/prebuild/config-node.test.js; pnpm run netlify-build
Not-tested: live Netlify production deploy before push
