Fix/parse time with parenthesized timezone in text

[deKibi]

Fix time parsing for timezone abbreviations wrapped in parentheses inside longer text messages.

The time converter now recognizes formats such as 10:00 (UTC) without changing the existing behavior for already supported time formats.

Added a regression test using the original Binance Alpha announcement to verify that the embedded time is detected correctly.

[deKibi]

@codex Please review this PR strictly within the scope of the time parsing fix.

sample text:

Binance Alpha is the first platform to feature AEON (AEON), with Alpha debut and trading starting on July 27, 2026, at 10:00 (UTC). 

Users with at least 245 Binance Alpha Points can claim an airdrop of 250 AEON tokens on a first-come, first-served basis. If the reward pool is not fully distributed, the score threshold will automatically decrease by 5 points every 5 minutes.

Please note that claiming the airdrop will consume 15 Binance Alpha Points. Users must confirm their claim on the Alpha Events page within 24 hours; otherwise, it will be deemed that users have given up claiming the airdrop.

Verify that timezone abbreviations wrapped in parentheses inside longer text messages are parsed correctly, including 10:00 (UTC) in the provided Binance Alpha announcement.

The 250 AEON tokens expression is expected to remain ignored under the current crypto eligibility rules and is outside the scope of this PR.

Please also verify that support for parentheses does not introduce false matches or regressions in the existing time formats. No nice-to-have suggestions – only issues directly related to this feature.

[chatgpt-codex-connector]

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