reduce allocations when adding files (#110)

* reduce allocations in ReportFileAccess

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

* fix tests

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

* use ants as a workerpool

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

* use gob to encode SBOMs to file

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

* allow a different period for the first relevancy tick

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

* update inspektor, config for fullpath tracing

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

* add coverage

Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>

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Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>