Add missing sacct output fields

[shiv-tyagi]

Problem

sacct implements only 16 of 100+ Slurm fields. Missing fields include MaxRSS, MaxVMSize, AllocTRES, ReqTRES, AveCPU, SystemCPU, UserCPU, ConsumedEnergy, and many others. This limits post-job analysis capability.

Currently supported: JobID, JobName, User, Account, Partition, State, Elapsed, NNodes, ExitCode, Start, End, Submit, TimeLimit, NodeList, NCPUS, ReqMem, QOS.

Expected Behavior

Key missing sacct fields (most commonly queried):

Field	Description
AllocTRES	Allocated TRES string (e.g., cpu=8,mem=32G,gres/gpu=2)
ReqTRES	Requested TRES string
Priority	Job priority at time of scheduling
NTasks	Number of tasks
ReqNodes	Requested nodes
AllocNodes	Allocated node count
Submit / Eligible	Submit/eligible timestamps
MaxRSS	Peak memory usage (requires agent metrics)
MaxVMSize	Peak virtual memory
AveCPU	Average CPU time
SystemCPU / UserCPU	System/user CPU time
ConsumedEnergy	Energy consumed (if available)

Acceptance Criteria

• AllocTRES and ReqTRES format correctly (e.g., cpu=8,mem=32000M,gres/gpu=2)
• Priority, NTasks, ReqNodes, AllocNodes fields display correct values
• New format specifiers work with -o custom format strings
• Default and long output formats include key new fields
• Fields requiring agent metrics (MaxRSS, AveCPU) display N/A until collection is implemented

Note: MaxRSS/AveCPU fields have a soft dependency on sstat process metrics collection. Most fields (AllocTRES, ReqTRES, Priority, timestamps) are independent and can be implemented immediately.