Add PUT scoped collection route

[jonhealy1]

stac-utils/stac-fastapi-pgstac#366

• Scoped Collection Update (PUT): Added PUT /catalogs/{catalogId}/collections/{collectionId} endpoint to update collection metadata within a scoped catalog context. This operation preserves existing hierarchy links (parent_ids) unless explicitly modified.
• DAG Preservation Guidance: Added documentation note recommending that updates to collections be performed through scoped routes rather than core STAC routes to properly preserve the poly-hierarchy DAG structure.
• Release v1.0.0.rc.1