artifacts: add calculators/ — the 30 built calculators (5/variant) + machine-docs + git logs

calculators/builder-adversary/run-02/machine-docs/BACKLOG-parse.md

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+# BACKLOG-parse
+
+## Build backlog
+
+- [x] D1 — precedence: implemented via separate `_expr`/`_term` levels
+- [x] D2 — left associativity: `while` loop in `_expr`/`_term`
+- [x] D3 — parentheses: `_primary` handles LPAREN/RPAREN
+- [x] D4 — unary minus: `_unary` level, right-recursive
+- [x] D5 — ParseError: defined and raised for all malformed inputs
+- [x] D6 — tests green: 46 tests, 0 failures
+
+All items complete. Awaiting Adversary verification.
+
+## Adversary findings
+
+_(Adversary writes here)_