Add downtimes example raw file
Add downtime avro schema file
Add avro_encoder argument handling
test on readind avro schema file and extracting fields
Produce list of dictionary objects from raw_file + schema
Implement encoding of input text file in avro binary
add encoder stats output
Add exported avro downtime file
Decoder argument handling
Decoder extracts schema from input binary file
Add export to json output file
Decoder: add schema name at stats output
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