fix: consolidate address w/ balance one at a time

[zachdaniel]

Changelog

Bug Fixes

• Start consolidating in a handle_continue/2 hook instead of a task that is kicked off in the init callback.

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so if necessary

I checked the box here, but I can't reproduce whatever is causing the queries to stack up. However, spawning a task from the init like that is suspect, and isn't how that would normally be done.

[coveralls]

Pull Request Test Coverage Report for Build 2eb2f78a-f1e0-442d-907b-117eb6b2796e

• 1 of 4 (25.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 81.137%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
apps/explorer/lib/explorer/counters/addresses_with_balance_counter.ex	1	4	25.0%

Totals
Change from base Build 70545e59-7263-4445-891c-7334f0e4d2a2:	0.03%
Covered Lines:	4710
Relevant Lines:	5805

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💛 - Coveralls