Get a list of renders with optional filtering.

Args:
project_id: Filter by project ID
shot_id: Filter by shot/input video ID
dub_id: Filter by dubbing file ID
status: Filter by job status
page: Page number for pagination (starts at 1)
page_size: Number of items per page (max 1000)
renders_resource: Injected renders resource dependency

Returns:
Dict containing 'data' (list of renders) and 'count' (total number)