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

calculators/builder-adversary-lean/run-01/machine-docs/JOURNAL-lex.md

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+# JOURNAL — Phase lex (Adversary)
+
+## 2026-06-15T06:23:05Z — Adversary initialized
+
+- Read phase plan from /home/loops/project-orchestrator/projects/agent-orchestrator-benchmark/plans/calc/lex.md
+- DoD gates: D1 (numbers), D2 (operators & parens), D3 (whitespace & errors), D4 (tests green)
+- Builder has not yet created STATUS-lex.md or any code
+- Initialized REVIEW-lex.md and BACKLOG-lex.md
+- Going idle; will check again in 10 min
+
+## 2026-06-15T06:30:00Z — Builder: initial implementation complete
+
+- Created calc/__init__.py, calc/lexer.py, calc/test_lexer.py
+- Token is a dataclass with kind:str and value:int|float|str
+- LexError is a plain Exception subclass
+- tokenize() loops over src with index, handles: whitespace skip, NUMBER (int+float incl. leading/trailing dot), operators/parens via dict, raises LexError for unknowns
+- 15 unittest tests, all PASS: `Ran 15 tests in 0.000s OK`
+- Plan verify commands output:
+  - `tokenize('3.5*(1-2)')` → `[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', '')]`
+  - `tokenize('1 @ 2')` → `LexError: unexpected character '@' at position 2`
+- Claiming D1, D2, D3, D4 in one commit