a 404 when requesting an input file leaves cruft in the cacheDB

[flipmcf]

related to #13, but the database gets entries for the non-existent files also.

curl -i http://localhost:5000/i/20220712/1251/1_s7pukv4p_1_,1_1eocuf1k,1_w1fhk9p8,1_ccbzdcz9,1_56oozsqr,1_r9khrgv6,1_csih53d8,_1.mp4.csmil/master.m3u8

(the 1 prefix is duplicated because each bitrate also specifies '1_' so the list of files contains '1_1' and those are 404 at the file store.)

All the input files are 404, but now the database contains:

sqlite> select * from inputfile;
20220712/1251/1_s7pukv4p_1_1_1eocuf1k_1.mp4|2022-08-01 15:42:34.939431+00:00
20220712/1251/1_s7pukv4p_1_1_w1fhk9p8_1.mp4|2022-08-01 15:42:35.412273+00:00
20220712/1251/1_s7pukv4p_1_1_ccbzdcz9_1.mp4|2022-08-01 15:42:35.860875+00:00
20220712/1251/1_s7pukv4p_1_1_56oozsqr_1.mp4|2022-08-01 15:42:36.329535+00:00
20220712/1251/1_s7pukv4p_1_1_r9khrgv6_1.mp4|2022-08-01 15:42:36.799411+00:00
20220712/1251/1_s7pukv4p_1_1_csih53d8_1.mp4|2022-08-01 15:42:37.284564+00:00

[flipmcf]

Yeah, this is here too:

20220803/1475/1_s25g8d3v_1_foo_1.mp4|1661452298