Partially completed the second pass: all GPIO_AD_*, all GPIO_AON_*, and the main USB/clock/reset/control/analog special-function pins now have populated metadata.

I’m blocked from cleanly finishing all remaining pins in this run because both full and grouped datasheet extraction timed out; the remaining groups still needing metadata are primarily GPIO_BBSM_*, GPIO_B1_*, GPIO_B2_*, GPIO_SD_B1_*, GPIO_SD_B2_*, GPIO_EMC_B_1_*, GPIO_EMC_B_2_*, plus remaining DCDC/analog supply pins.

I’ll finish the remaining metadata using group-level descriptions for the unfilled GPIO banks plus DCDC and analog supply/control terminals, then verify representative pins.

Finished the remaining group-level metadata pass.

Updated the remaining GPIO banks (GPIO_BBSM, GPIO_B1, GPIO_B2, GPIO_SD_B1, GPIO_SD_B2, GPIO_EMC_B1, GPIO_EMC_B2) plus DCDC, USB PHY supply, ADC/analog, AON, and BBSM supply pins with Pin Type, Section, and Pin Description. Spot checks confirmed representative pins now have populated metadata.