fix(filter)!: keep a short fraction of a quoted time

[pdevito3]

For later consideration in a major version. Do not merge now. This PR is one of two PRs that replace #144. Each PR has one breaking change. The captain decides on each PR separately.

• fix(filter)!: read the zone of a date and time value only after the fraction #165: the zone of a date and time value comes after the fraction.
• This PR: a quoted time keeps a short fraction.

#134 restored the v1.14.2 rule (restore commit b49ad2b). This PR re-applies this part of 5c84ef6.

What breaks

A quoted time with a fraction of 1 or 2 digits keeps the fraction. On v1.14.2 and main, a quoted time uses the milliseconds only when the fraction has 3 or more digits, and the microseconds only when it has 6 or more. An unquoted time already keeps every digit on main.

Example

Input	v1.14.2 and main	This PR
Time == "08:30:00.5"	matches 08:30:00	matches 08:30:00.500
Time == "08:30:00.50"	matches 08:30:00	matches 08:30:00.500
Time == "08:30:00.500"	matches 08:30:00.500	matches 08:30:00.500 (no change)

Justification

.5 is half a second. A filter that drops it gives wrong rows without an error. A quoted time and an unquoted time now give the same value.

Migration

If you wrote a short fraction and expected the whole second, remove the fraction.

Code

The rightIsQuotedLiteral argument of CreateRightExpr and CreateRightExprFromType is removed. The time conversion was its only user.

README

The date and time format list says that a time fraction keeps every digit.

Tests

• Unit FilterParsingRegressionTests.fractional_seconds_are_kept: the cases Time == "08:30:00.5" and Time == "08:30:00.50" expect the fraction again.
• Unit quoted_time_with_fewer_than_three_fraction_digits_drops_the_fraction is removed. It held the v1.14.2 behavior.
• Integration FilterParsingRegressionTests.fractional_second_value_matches_by_its_fraction: a quoted .5 matches the fraction row on Postgres.
• dotnet test on this branch: 470 unit tests and 297 Postgres integration tests (Testcontainers) pass, 0 failures.

Rebase on main

This branch is rebased on current main. Main #169 added a call to CreateRightExprFromType in the conversion path. This PR removes the rightIsQuotedLiteral argument from that call too. The IsQuotedLiteral flag stays in the parse result, because the property path check on the right side uses it.