fix: create sender allocation on receipt notification

[coveralls]

Pull Request Test Coverage Report for Build 9505175851

Details

• 95 of 127 (74.8%) changed or added relevant lines in 2 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.3%) to 66.834%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tap-agent/src/agent/sender_account.rs	8	13	61.54%
tap-agent/src/agent/sender_accounts_manager.rs	87	114	76.32%
<!--	Total:	95	127	74.8%	-->

Files with Coverage Reduction	New Missed Lines	%
tap-agent/src/agent/sender_account.rs	1	80.62%
tap-agent/src/agent/sender_accounts_manager.rs	2	83.84%
<!--	Total:	3		-->

Totals
Change from base Build 9504089856:	0.3%
Covered Lines:	3863
Relevant Lines:	5780

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💛 - Coveralls