gt3-backside-route-policylisted

# GT3 Backside Route Policy Apply this policy for GT3 experiments unless the task brief explicitly overrides it. ## Policy defaults 1. Keep CTS route on `M4/M5`. 2. Keep PDN on high layers (`BSPDN_HI` => `M6/M7`). 3. Reserve `BPR` for PDN. 4. Allow backside signal routing on `BM2/BM1` only (`index 1..2`). ## Submit controlled run ```bash ROOT=/mnt/research/Hu_Jiang/Students/Fang_Donghao/TAMU-ASAP07-BSPDN-BPR-V0.00 cd "$ROOT" TASK_BRIEF=<task_brief_md> \ BACKSIDE_SIGNAL_NET_FILE=<net_list_txt> \ BACKSIDE_SIGNAL_NET_BOTTOM_INDEX=1 \ BACKSIDE_SIGNAL_NET_TOP_INDEX=2 \ bash scripts/debug/submit_gt3_route_rc_consistency.sh <design> <run_tag> ``` Monitor outputs: - `slurm_logs/04_delay_modeling/<run_tag>.monitor.md` - `slurm_logs/04_delay_modeling/<run_tag>.monitor.history.tsv` ## Post-run checks 1. Verify backside signal occupancy appears on BM layers. 2. Verify signal occupancy does not use BPR. 3. Verify CTS remains on `M4/M5` window. Load `references/policy_checks.md` for quick command snippets.