Implement SQLite TimeSpan translation

[buhaiov-vs]

• Add ef_days and ef_timespan UDFs in SqliteRelationalConnection
• Add SqliteTimeSpanMemberTranslator and SqliteTimeSpanMethodTranslator
• Translate TimeSpan binary ops and DateTime ± TimeSpan in SqliteSqlTranslatingExpressionVisitor
• Translate Max/Min(TimeSpan) in SqliteQueryableAggregateMethodTranslator
• Add TimeSpan and DateTime Subtract_and_TotalDays SQLite tests

Fixes #18844

[buhaiov-vs]

@dotnet-policy-service agree

[Copilot]

Pull request overview

This PR implements SQLite TimeSpan member/method/operator translations by registering two UDFs (ef_days, ef_timespan) on the SQLite connection and adding translators for TimeSpan members, methods, binary operators, and aggregate operations.

Changes:

• Register ef_days and ef_timespan UDFs on the SQLite connection, and add SqliteTimeSpanMemberTranslator and SqliteTimeSpanMethodTranslator for member/method translations
• Add TryTranslateTimeSpanDateTimeBinary and unary negate handling in SqliteSqlTranslatingExpressionVisitor, plus Min/Max aggregate support in SqliteQueryableAggregateMethodTranslator
• Update test SQL baselines for TimeSpan member tests and add/rename the Subtract_and_TotalDays test across SQLite/SQL Server/Cosmos providers

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/EFCore.Sqlite.Core/Storage/Internal/SqliteRelationalConnection.cs	Registers ef_days (two overloads: TimeSpan? and string?) and ef_timespan UDFs
src/EFCore.Sqlite.Core/Query/Internal/Translators/SqliteTimeSpanMemberTranslator.cs	New file translating TimeSpan properties (Hours, Minutes, etc.) via ef_days
src/EFCore.Sqlite.Core/Query/Internal/Translators/SqliteTimeSpanMethodTranslator.cs	New file translating TimeSpan methods (Duration, FromDays, FromHours, etc.)
src/EFCore.Sqlite.Core/Query/Internal/SqliteSqlTranslatingExpressionVisitor.cs	Removes TimeSpan from restricted binary expressions and adds new TimeSpan/DateTime binary operator translations
src/EFCore.Sqlite.Core/Query/Internal/SqliteSqlExpressionFactory.cs	Adds EfDays and EfTimespan helper factory methods
src/EFCore.Sqlite.Core/Query/Internal/Translators/SqliteQueryableAggregateMethodTranslator.cs	Enables Min/Max aggregate translations for TimeSpan
src/EFCore.Sqlite.Core/Query/Internal/SqliteMemberTranslatorProvider.cs	Registers new SqliteTimeSpanMemberTranslator
src/EFCore.Sqlite.Core/Query/Internal/SqliteMethodCallTranslatorProvider.cs	Registers new SqliteTimeSpanMethodTranslator
test/EFCore.Specification.Tests/Query/Translations/Temporal/DateTimeTranslationsTestBase.cs	Renames subtract_and_TotalDays → Subtract_and_TotalDays
test/EFCore.Sqlite.FunctionalTests/Query/Translations/Temporal/TimeSpanTranslationsSqliteTest.cs	Updates SQL baselines for member translation tests
test/EFCore.Sqlite.FunctionalTests/Query/Translations/Temporal/DateTimeTranslationsSqliteTest.cs	Adds SQL baseline for Subtract_and_TotalDays
test/EFCore.SqlServer.FunctionalTests/Query/Translations/Temporal/DateTimeTranslationsSqlServerTest.cs	Renames override to match base class rename
test/EFCore.Cosmos.FunctionalTests/Query/Translations/Temporal/DateTimeTranslationsCosmosTest.cs	Renames override to match base class rename

[Copilot]

The TimeSpan.Parse(value) call in the ef_days string overload (line 201) uses the current thread's culture. While the default TimeSpan.ToString() format ("c") is culture-invariant and can be parsed successfully, it is safer to explicitly use TimeSpan.Parse(value, CultureInfo.InvariantCulture) to avoid potential issues with culture-specific format variations, consistent with how decimal.Parse is called with CultureInfo.InvariantCulture in the same class (line 191).

Suggested change

	value => value == null ? null : TimeSpan.Parse(value).TotalDays,
	value => value == null ? null : TimeSpan.Parse(value, CultureInfo.InvariantCulture).TotalDays,