Fix terminal temporary array return typing

[luisleo526]

Summary

• infer exact primitive UDF return types for terminal get calls on direct built-in array temporaries, including positional, mixed, keyword, copy, and bounded zero-argument forward-UDF forms
• reconcile forward return metadata without re-visiting effectful AST nodes, and reject recursion reached through the new temporary-reader edge
• recover primitive UDF element types for array.from vectors and deduplicate repeated analysis of one stateful FuncCall AST while preserving real caller clones
• retain fail-closed behavior for arbitrary receivers, argument-bearing forward calls, keyword array.copy(id=...), nested temporary .copy(), and forward calls outside the direct array.from element shape

Validation

• focused compile suite: 59/59
• full native pytest: exit 0, 2,129 collected nodes
• Pyodide parity: 277/277 fixtures, 263 accepted plus 14 expected errors
• frozen source differentials: historical 666 and current 812 both have zero output/error diffs
• exhaustive N=3 causal matrix: 8/8 cells, 240/240 case evaluations, all-off and publication gates true, GO with zero violations; fingerprint 849c91ec934e59e28540e1d92406af48428428ba2f99c5f05753324beba67f0e
• fresh forced-no-cache scraper gate on current public main: 416/416 accounted, 409 OK plus the same 7 expected non-OK rows, 0 UP / 0 DOWN
• scoreboard unchanged at 354 Excellent / 47 Strong / 4 Moderate / 2 Weak; all 410 existing engine tapes and all 410 shared generated C++ outputs are byte-identical

No TradingView source, tape, threshold, grader, or strategy-specific behavior changed.