Looks up the security deposit rules (deposits only) for one US state, with a covered city's deposit ordinance (Chicago, San Francisco, Berkeley, Los Angeles, Seattle, Portland, Minneapolis, Saint Paul). Inputs: state (two-letter code); optional city. Returns the deposit return deadline and what starts it, itemization and documentation duties, allowed deductions and depreciation, deposit interest, penalties, the deposit cap and recent changes, with citations. Not for: settling a specific move-out (deposit_settlement_settle does that), evictions, unpaid-rent collection, rent increases or rent control, lease renewal or notice periods, legal advice. Deterministic and source-cited: the same input gives the same result.