fix: reduce sentmm2 sort_thread_mem and mbuffer to fit Slurm mem

sort_thread_mem 4G * 32 threads = 128GB + mbuffer 128GB = 256GB,
exceeding the 200GB Slurm mem_mb allocation. minimap2 streams
slower than Sentieon BWA, so mbuffer fills up and OOMs the job,
causing 'samtools sort: truncated file'.

Changed:
- sort_thread_mem: 4G -> 3G (32 * 3G = 96GB ceiling)
- mbuffer: 128G -> 32G (plenty for I/O smoothing)
- Total realistic peak: ~140-150GB, fits in 200GB allocation

Author: iamh2o

config/day_profiles/slurm/templates/rule_config.yaml

@@ -136,9 +136,9 @@ sentmm2_align_sort:
     minimap2_threads: 160
     sort_threads: 32
     mem_mb: 200000
-    sort_thread_mem: "4G"
+    sort_thread_mem: "3G"
     minimap2_opts: " -ax map-hifi "
-    mbuffer: " | mbuffer -m 128G -q -s 2M "
+    mbuffer: " | mbuffer -m 32G -q -s 2M "
     constraint: ""
 
 strobe_align_sort: