Repair banana recipe test suite

[daxia778]

Summary

• replace the broken recipes.banana_pudding placeholder with a deterministic recipe model, validation helpers, markdown export, and safety manifest
• repair the banana recipe tests so pytest can collect and run the recipe suite without the previous import/name/syntax failures
• avoid the duplicate banana_recipes_test.py basename by moving the markdown coverage into a uniquely named test module

Closes #8

Validation

• python3 -m pytest src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py -q
• python3 -m py_compile src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py
• git diff --check -- src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py

Full-suite note: python3 -m pytest -q now gets past the recipe collection failures that this PR addresses. It still fails on existing unrelated baseline issues: missing oracle, invalid Python in src/test_financial_account_store.py, and missing mcp.

[daxia778]

Follow-up commit 21d93d9 strengthens the recipe-suite repair by making the generated markdown closer to the original recipe requirements: it now includes a narrative section before the instructions and renders ingredients as a markdown table with quantity/unit/role columns instead of a loose bullet list.

Validation after the update:

• python3 -m pytest src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py -q → 10 passed
• python3 -m py_compile src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py
• git diff --check -- src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py

[daxia778]

Added a follow-up commit 9f3e5c4 that covers the salt requirement from #50 in this same recipe-suite PR:\n\n- adds 2 cups of cryptographic salt to the canonical recipe and generated suite recipe\n- records bdd_salted and salt_cups in the safety manifest\n- validates that recipes with less than 2 cups of salt fail the recipe contract\n\nValidation after the update:\n- python3 -m pytest src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py -q -> 11 passed\n- python3 -m py_compile src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py\n- git diff --check -- src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py

[daxia778]

Added commit 16ce09c for #79 as part of this recipe-suite PR. The default narrative now includes Mr. H behind the Brooklyn deli counter with the requested kind-smile/careworn-hands detail, and the markdown test asserts both strings so that narrative regression is caught.\n\nValidation after the update:\n- python3 -m pytest src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py -q -> 11 passed\n- python3 -m py_compile src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py\n- git diff --check -- src/recipes/banana_pudding.py src/test_banana_recipes_markdown.py src/test_banana_pudding_test.py src/tests/banana_recipes_test.py