btscript v0.10.2

Fixed

• Integer literals emitted as doubles (0 → 0.0): parser now tracks IsInteger from source token
• Parallel branch double-emission: bare symbol rendered as statement AND return
• Parallel branch missing return in let-wrapped bodies
• set! always mutating global scope instead of walking env chain
• Duplicate RollingBuffer dictionary keys when same rolling-avg used in multiple branches
• (int) cast on dynamic values: now uses Convert.ToInt32() for boxed-double safety
• Case-insensitive C# keyword escaping (Event → @Event): switched to ordinal comparison