Crash in `Date.encode` if the date is long distant future

[t-ae]

Describe the issue

Date.encode method crashes if the date is long distant future

Vapor version

4.111.1

Operating system and version

macOS 26.3.1

Swift version

6.2.3

Steps to reproduce

No response

Outcome

No response

Additional notes

postgres-nio/Sources/PostgresNIO/New/Data/Date+PostgresCodable.swift

Lines 18 to 19 in cc0201c

	let seconds = self.timeIntervalSince(Self._psqlDateStart) * Double(Self._microsecondsPerSecond)
	byteBuffer.writeInteger(Int64(seconds))

Date.encode internally computes its seconds from _psqlDateStart and convert it to Int64.
If the seconds is greater than Int64.max, this method crashes.

Fatal error: Double value cannot be converted to Int64 because the result would be greater than Int64.max