Match Pine float comparisons and preserve dynamic TA state

[luisleo526]

Summary

• lower explicit float relational operators through the TradingView-pinned finite comparison band while preserving na-falsy semantics and exact non-float comparisons
• support input-driven request.security timeframe switches without losing generated state or string typing
• preserve lazy SMA call-site state by keeping short-circuit-dependent calls out of eager precalculation

These three fixes were already accepted together by the validation campaign; this PR recomposes the exact tested code onto the current v0.10.0 release commit.

Validation

• final tree differs from accepted codegen caeb42f only by VERSION 0.10.0
• full suite against merged engine main ada0ca1: 1537 passed, 2 skipped
• accepted composition previously passed the 252-strategy corpus gate and forced no-cache 412-row community sweep with 0 DOWN
• campaign effects include exact float-edge comparisons, dynamic-security lowering, and lazy-SMA call-site parity; no verifier thresholds, TV tapes, or generated corpus outputs change in this PR