sqlite-utils 4.1.1 released, fixes foreign key cascade delete transaction bug

sqlite-utils 4.1.1 primarily fixes a foreign key cascade edge case discovered by Claude Chat while testing version 4.1. When inside a transaction with PRAGMA foreign_keys enabled, table.transform() now raises TransactionError, preventing CASCADE, SET NULL, or SET DEFAULT actions triggered by deleting the old table from silently deleting or modifying referenced rows. Previously, since the pragma cannot be changed within a transaction, the operation could cause data loss without warning. Additionally, the release improves documentation: CLI and Python API docs now cross-reference each other, with CLI sections linking to corresponding Python API docs and vice versa. Developers using sqlite-utils should upgrade to 4.1.1 promptly, especially when performing table transformations with foreign key constraints in production, to avoid potential data integrity issues.