feat!: drop support for TAPv1

[tmigone]

tap_aggregator operator changelog:

• Remove --domain-verifying-contract
• Remove TAP_DOMAIN_VERIFYING_CONTRACT
• Rename --domain-verifying-contract-v2 → --domain-verifying-contract
• Rename TAP_DOMAIN_VERIFYING_CONTRACT_V2 → TAP_DOMAIN_VERIFYING_CONTRACT
• Remove --domain-salt / TAP_DOMAIN_SALT if present (was unused)

[coveralls]

Coverage Report for CI Build 25184266901

Coverage increased (+6.6%) to 78.102%

Details

• Coverage increased (+6.6%) from the base build.
• Patch coverage: 30 uncovered changes across 2 files (133 of 163 lines covered, 81.6%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
tap_aggregator/src/aggregator.rs	144	117	81.25%
tap_aggregator/src/main.rs	3	0	0.0%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	1233
Covered Lines:	963
Line Coverage:	78.1%
Coverage Strength:	281.33 hits per line

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💛 - Coveralls