Show each counter's owning process in profiler-cli

[fatadel]

Main | Deploy preview

Counters listed by "pq counter list" gave no hint about which process they belonged to, so profiles with many identically-named counters (one "Process CPU" per process) were impossible to tell apart. Each counter line now carries its process handle, name, and pid, mirroring how "profile info" labels processes so the two outputs cross-reference:

c-2: Process CPU (CPU) [p-0 Parent Process, pid 47021] [2787 samples]

"counter info" gains a matching Process line. The handle is dropped when the owning process can't be resolved, leaving just the name and pid.

Closes #6134

---

Example profile

Main changes:

1. pq counter list shows concise identifying information for the related process of each counter:

[Thread: t-18 (GeckoMain) | View: Full profile | Full: 14.017s]

Counters (22):
  c-0: Memory (Memory) [p-0 Parent Process, pid 80946] - memory range in graph: 3.58MB [6208 samples]
      ▇▇▇▇▇█████▆▇▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▄▄▄▆▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▇

  c-2: Memory (Memory) [p-1 socket, pid 80952] - memory range in graph: 148KB [10 samples]
      ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███████████

2. pq counter info <handle> adds the same information under "Process:" line:

[Thread: t-18 (GeckoMain) | View: Full profile | Full: 14.017s]

Counter c-0: Memory
  Name: malloc
  Category: Memory
  Description: Amount of allocated memory
  Unit: bytes
  Graph type: line-accumulated
  Process: p-0 Parent Process [pid 80946]
  Main thread: t-0 (GeckoMain)
  Samples: 6208 total, 6208 in current range
  Time span: 445.71μs → 14.015s
  Stats (current range):
    memory range in graph: 3.58MB
  Memory over time:
...

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.55%. Comparing base (e8dbbcf) to head (ffae883).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #6164    +/-   ##
========================================
  Coverage   83.54%   83.55%            
========================================
  Files         343      343            
  Lines       36852    36853     +1     
  Branches    10350    10246   -104     
========================================
+ Hits        30789    30792     +3     
+ Misses       5635     5633     -2     
  Partials      428      428            

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[fatadel]

Thanks for the review, @canova! I've now addressed the issues.

[canova]

Thanks!