fix: use correct llvm types for super() constructor args

[cs01]

Summary

• super() calls previously hardcoded all arguments as i8*, causing compile failures when parent constructors take numeric parameters
• now looks up parent constructor's paramTypes and uses mapParamTypeToLLVM for correct types
• adds ensureDouble coercion for numeric args passed to super()

Test plan

• new test fixture: classes/class-super-numeric.ts — Vehicle(string, number) + Car extends Vehicle
• verify:quick passes (tests + stage 1 self-hosting)

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