e76925391c
RTL fix: matched_filter_multi_segment.v ST_WAIT_FFT now waits for processing chain to complete ALL 1024 outputs and return to IDLE before advancing to next segment. Previously, it transitioned on the first fft_pc_valid edge, causing the chain to still be outputting while multi-seg started collecting data for the next segment. This broke the handshake and caused permanent deadlock after segment 0. Also fixes forward reference of sample_addr_from_chain in radar_receiver_final.v (declaration moved before first use). New files: - tb/tb_radar_receiver_final.v: P0 integration test for full RX pipeline (ADC->DDC->MF->range_bin_decimator->doppler), 10 checks - tb/ad9484_interface_400m_stub.v: behavioral ADC stub for iverilog All existing tests still pass: multi-seg 32/32, MF co-sim 3/3, Doppler co-sim 14/14.