Fix persistent callable storage ownership

[luisleo526]

Summary

• allocate collision-safe storage identities for ordinary callable persistent locals while preserving Pine lexical names
• keep global, block, loop, history, security-helper, and clone boundaries declaration-aware, with unsupported ownership shapes failing closed
• avoid a phantom terminal-return callable clone by reusing the in-scope return specification
• add broad primitive, array, map, matrix, nested-call, history, shadowing, and fail-closed regression coverage

Validation

• full engine-enabled pytest: 100% complete, exit 0
• focused owner-state suite: 67/67
• exhaustive 2^5 publication matrix: 32/32, all-off bug reproduced, fingerprint 1af32222c2ee516da6d45ce2505a1136b9266bc1b4a3aaa8437f9ebf76647e74
• independent no-cache OFF/ON target replay: 4/4; B3ar Weak to Excellent with exact 749/749 parity; Hexatrades and QuantAlpha trade tapes unchanged; 3Commas generated C++ and tape byte-identical
• full no-cache scraper gate: 415/415 accounted, 408 OK, 1 no-trades, 5 expected transpile errors, 1 expected run error, 0 unresolved timeout, 1 UP, 0 DOWN
• independent R7 review: PASS, no P0/P1 blocker
• compileall, diff check, scoped Ruff check and format check: green