BOCA RATON, FL — The anonymous tip came in during July. Someone told Boca Raton Police that a woman was working as a commercial sex worker inside the city, according to a probable cause affidavit filed by the department. By the evening of Aug. 7, an undercover detective had texted a phone number pulled from an online advertisement, agreed on a $700 price for a one-hour massage and walked into a Boca Raton location carrying pre-recorded police mo…