Get Relative Strength Index for momentum analysis

Returns RSI oscillator data (0-100 scale) for identifying overbought/oversold conditions, sampled to ~200 data points showing momentum trends. Preferred RSI tool — the /ta/{slug}/rsi and /ta/{slug}/rsi/latest variants are legacy; use this, or /ta/{slug}/allLatest for all indicators in one call. Subject to the shared TA rate pool; for many assets prefer /agentFriendly/full_assets_by_slug with includeTaData=true.