Help me migrate [CURRENT TECHNOLOGY/FRAMEWORK] to [TARGET TECHNOLOGY/FRAMEWORK]. Codebase size: [APPROXIMATE]. Timeline: [AVAILABLE]. What triggered this migration: [REASON].
Create a migration plan covering: 1) Risk assessment — what's most likely to break, 2) Phased migration strategy that keeps production running, 3) Coexistence pattern for running old and new code simultaneously, 4) Test strategy to validate equivalence, 5) Rollback plan at each phase, 6) Common gotchas specific to this technology pairing, 7) Effort estimate by phase. Identify quick wins I can tackle first to build confid...