Implement injector utility to feed blocks into seq-db when metafile is corrupted

[eguguchkin]

Problem
This functionality may be needed when the metafile (its header) is completely corrupted.

Solution
In such a case, we plan to use the already existing unpacker utility.
Additionally, we need to create a new utility – injector (alternative name: inserter) – which will form blocks and send them to seq-db (via seqproxy).

Tasks

• Implement the injector utility
• Ensure that the compiled binaries of both unpacker and injector are present in the Docker image