Flatten Cloud v2 and OSS v2 spec directories to product root with
self-documenting filenames, matching the pattern used for influxdb3 products.
Remove all 5 v1-compatibility directories — those endpoints are already
included in the main spec (tagged as v1/v2 Compatibility).
Old v1-compat URLs are preserved as Hugo aliases for redirects.
Also includes:
- Migrate inline markdown links from management API spec descriptions
into tags.yml x-related fields (Cloud Dedicated + Clustered)
- Wire post-process-specs.ts into generate-api-docs.sh build pipeline
- Fix doubled static/openapi download filenames
- Update project plan with design decisions
Jason Stirnaman