GRDB 7: enhance ergonomics of record methods that insert/save/upsert and fetch #1226

Job	Run time
SPM (Xcode_16.1.app, macOS-14, Xcode 16.1)	12m 19s
Framework (Xcode_16.1.app, macOS-14, platform=macOS, macOS)	4m 3s
Framework (Xcode_16.1.app, macOS-14, OS=18.1,name=iPhone 15 Pro, iOS)	9m 50s
CustomSQLite (Xcode_16.1.app, macOS-14, Xcode 16.1)	5m 46s
Framework (Xcode_16.1.app, macOS-14, OS=18.0,name=Apple TV, tvOS)	3m 42s
SQLCipher3 (Xcode_16.1.app, macOS-14, Xcode 16.1)	7m 10s
SQLCipher4 (Xcode_16.1.app, macOS-14, Xcode 16.1)	12m 9s
XCFramework (Xcode_16.1.app, macOS-14, Xcode 16.1)	6m 27s
	1h 1m 26s

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