REST APIs for files

[dfaller]

We need some REST APIs for retrieving general files:

1. General file API at /files/

   • query params: started, ended, time_field (like from /products/), and file_name
   • move source_started and source_ended to the list of geospatial fields (making it apply to source files as well)
   • response should include all fields not specific to sources or products, including file_type

2. Job input file API at /jobs/{id}/input_files/

   • all inputs files for the given job, use the JobInputFile model, fall back to job_data if no JobInputFile models returned
   • same query params from (1.) plus job_input which filters on the job_input field in JobInputFile
   • response should be the same as (1.)

3. Recipe input file API at /recipes/{id}/input_files/

   • all inputs files for the given recipe, use the RecipeInputFile model, fall back to recipe_data if no RecipeInputFile models returned
   • same query params from (1.) plus recipe_input which filters on the recipe_input field in RecipeInputFile
   • response should be the same as (1.)

All 3 APIs should use a general "filter_files" method on the ScaleFileManager.