Support age (s/ftp) and size over time filters (both file and s/ftp)

[gdupontf]

Expected Behavior

Enhance available file filtering strategies out-of-the-box.

Current Behavior

Filtering files based on a last-modified strategy isn't currently possible out-of-the-box.
There are publically-available possible implementations to consider.
Same deal with watching file size over time.

Context

Such functionality is desirable especially for the numerous cases where one doesn't control the producer side and thus can't use a marker file.
The size-based strategy is, as always, a guard against slow producers and, in the case of SFTP, extreme edge case network slowdowns.
I would expect the size-based strategy to make use of a metadata store, probably.

[artembilan]

We don't this as priority, so feel free to contribute.
I don't think this kind of timestamp and/or size comparison should go to the metadata store.
See our LastModifiedFileListFilter, for example.

[gdupontf]

I can try to dabble in it when I get the chance.

And look into refactor guidelines to share some logic with the existing filter.

[artembilan]

@AdamaSorho ,

this one also should be as straightforward modeling after LastModifiedFileListFilter example for (S)FTP and SMB modules.