Increase disk sizing multiplier from 3x to 6x

Update dynamic disk size calculation to use 6x multiplier for input
BAM files instead of 3x. This accounts for minimap2 creating large
uncompressed SAM files during alignment before converting to BAM.

Testing with 3x multiplier (submission 24dfd2f6-6a10-441e-8c1c-9c059e98befa)
showed continued failures for 75GB inputs, indicating the multiplier
was insufficient for alignment workloads.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: dpark01

pipes/WDL/tasks/tasks_reports.wdl

@@ -418,7 +418,7 @@ task align_and_count {
 
   String  reads_basename=basename(reads_bam, ".bam")
   String  ref_basename=basename(ref_db, ".fasta")
-  Int disk_size = ceil((3 * size(reads_bam, "GB") + 2 * size(ref_db, "GB") + 100) / 375.0) * 375
+  Int disk_size = ceil((6 * size(reads_bam, "GB") + 2 * size(ref_db, "GB") + 100) / 375.0) * 375
 
   parameter_meta {
     reads_bam: {

pipes/WDL/tasks/tasks_taxon_filter.wdl

@@ -38,7 +38,7 @@ task deplete_taxa {
   Float        blast_db_size = if defined(blastDbs) then size(select_first([blastDbs, []]), "GB") else 0
   Float        bwa_db_size = if defined(bwaDbs) then size(select_first([bwaDbs, []]), "GB") else 0
   Float        total_db_size = bmtagger_db_size + blast_db_size + bwa_db_size
-  Int          disk_size = ceil((3 * size(raw_reads_unmapped_bam, "GB") + 2 * total_db_size + 100) / 375.0) * 375
+  Int          disk_size = ceil((6 * size(raw_reads_unmapped_bam, "GB") + 2 * total_db_size + 100) / 375.0) * 375
 
   command <<<
     set -ex -o pipefail
@@ -122,7 +122,7 @@ task filter_to_taxon {
 
   # do this in two steps in case the input doesn't actually have "cleaned" in the name
   String   bam_basename = basename(basename(reads_unmapped_bam, ".bam"), ".cleaned")
-  Int disk_size = ceil((3 * size(reads_unmapped_bam, "GB") + 2 * size(lastal_db_fasta, "GB") + 100) / 375.0) * 375
+  Int disk_size = ceil((6 * size(reads_unmapped_bam, "GB") + 2 * size(lastal_db_fasta, "GB") + 100) / 375.0) * 375
 
   command <<<
     set -ex -o pipefail