indexer: query to count elections by type

[altergui]

while working on vocdoni/interoperability#83 i found it impossible to "count elections by type"

this would allow advancing towards epic vocdoni/interoperability#23

my understanding of "elections by type" is complex, given by three bools

• anonymous vs non-anonymous
• secret-until-the-end vs plaintext
• dynamic census vs static census

(am i on track? @jpaulet @p4u)

so i can imagine a func that would receive 3 bool parameters and return the count, would suffice. i'd then query it with different combinations of bools and export the metrics.

[mvdan]

Is this still something that is needed, and I should work on it?

[altergui]

@p4u?

[p4u]

Makes sense