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

calculators/builder-adversary-stateless/run-05/machine-docs/JOURNAL-parse.md

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+# JOURNAL-parse.md
+
+## 2026-06-15 — Build + verify
+
+Lex phase DONE. Token kinds: NUMBER, PLUS, MINUS, STAR, SLASH, LPAREN, RPAREN, EOF.
+
+Grammar chosen (iterative at each level → left associativity by construction):
+```
+expr    → term   (('+' | '-') term)*
+term    → unary  (('*' | '/') unary)*
+unary   → '-' unary | primary
+primary → NUMBER | '(' expr ')'
+```
+
+### Manual verification output
+
+```
+D1 1+2*3: BinOp('+', Num(1), BinOp('*', Num(2), Num(3)))
+D2 8-3-2: BinOp('-', BinOp('-', Num(8), Num(3)), Num(2))
+D2 8/4/2: BinOp('/', BinOp('/', Num(8), Num(4)), Num(2))
+D3 (1+2)*3: BinOp('*', BinOp('+', Num(1), Num(2)), Num(3))
+D4 -5: Unary('-', Num(5))
+D4 -(1+2): Unary('-', BinOp('+', Num(1), Num(2)))
+D4 3*-2: BinOp('*', Num(3), Unary('-', Num(2)))
+D5 '1 +' -> ParseError: unexpected end of input
+D5 '(1' -> ParseError: unclosed parenthesis
+D5 '1 2' -> ParseError: unexpected token 'NUMBER' (2) after expression
+D5 ')(' -> ParseError: unexpected token 'RPAREN' (')')
+D5 '' -> ParseError: empty input
+```
+
+Test run: `Ran 48 tests in 0.001s — OK` (21 lex + 27 parser)