[fix](TIMESTAMPTZ) Preserve TIMESTAMPTZ for microsecond interval arithmetic - #66843

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Mryange:fix-timestamptz-microsecond-interval

Commits on Aug 17, 2026

[fix](fe) Preserve TIMESTAMPTZ for microsecond interval arithmetic
Mryange
committed
2681cff
[fix](fe) Match wildcard scales for microsecond intervals
Mryange
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d86cce4
[fix](fe) Cover remaining microsecond interval functions
Mryange
committed
1a605ec