v0.4.2 — corrected semantic checks reach hub installs

v0.4.1 was tagged before the engine fix landed, so hub installs picked up three broken checks. This corrects that.

Check	Was silently missing
S1	Every multi-line request.security(). Wrapping is the normal formatting, so most real repainting went undetected.
S2	The false branch of a ternary. cond ? na : ta.sma(...) passed clean.
S9	Counted strategy.cancel as an exit. Cancel withdraws a pending order; it does not close a position.

Requires pinescript-v6-validator@^0.2.1.

No other change.