Add DefaultContextTimeout option

[jinzhu]

• Do only one thing
• Non breaking API changes
• Tested

What did this pull request do?

User Case Description

[propel-code-bot]

Introduce DefaultContextTimeout Configuration for DB Contexts

This pull request adds a new DefaultContextTimeout field to the GORM Config struct. The change enables users to configure a default timeout for DB contexts, applying a context.WithTimeout to DB operations when no deadline is set and DefaultContextTimeout is greater than zero. Several modifications were made to ensure this timeout is respected in the main query execution and transaction initiation paths. Additionally, test dependencies in go.mod were updated.

Key Changes

• Added DefaultContextTimeout (time.Duration) to gorm.Config to allow setting a global default context timeout.
• Modified callbacks.go to wrap statement contexts with context.WithTimeout using DefaultContextTimeout when appropriate.
• Adjusted transaction context initialization in finisher_api.go to apply DefaultTransactionTimeout only if set and not already present.
• Changed references from db.Config.DefaultTransactionTimeout to db.DefaultTransactionTimeout for internal consistency.
• Updated test dependencies: github.com/stretchr/testify upgraded from v1.10.0 to v1.11.0; github.com/microsoft/go-mssqldb upgraded from v1.9.2 to v1.9.3.

Affected Areas

• gorm.go (Config struct, initialization logic)
• callbacks.go (processor logic for context timeout)
• finisher_api.go (transaction context timeout and handling)
• tests/go.mod (test dependencies)

This summary was automatically generated by @propel-code-bot

[propel-code-bot]

[CriticalError]

Consider adding a safety check for nil statement context to prevent potential panic:

Suggested change

	if db.DefaultContextTimeout > 0 {
	if _, ok := stmt.Context.Deadline(); !ok {
	stmt.Context, _ = context.WithTimeout(stmt.Context, db.DefaultContextTimeout)
	}
	}
	if db.DefaultContextTimeout > 0 {
	if stmt.Context == nil {
	stmt.Context = context.Background()
	}
	if _, ok := stmt.Context.Deadline(); !ok {
	stmt.Context, _ = context.WithTimeout(stmt.Context, db.DefaultContextTimeout)
	}
	}

If stmt.Context is nil when checking Deadline(), it will cause a panic. This adds a safety check to initialize with a background context if needed.

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