(DynamicSelector-Phase4) Propagate signal ownership through app discovery and lifecycle consumers

[damemi]

This implements phase 3 of #2234

Previous PRs:

1. (DynamicSelector-Phase1) Move DynamicPIDSelector to global context #2250
2. (DynamicSelector-Phase2) Extend dynamic selection to network and stats #2279
3. (DynamicSelector-Phase3) Refactor DynamicPIDSelector into signal-aware views #2340

This PR wires up the actual per-signal ownership for AppO11y, Network, and Stats Metrics. AppO11y still uses a union view for app traces+metrics (will be split in the next PR). Dynamic/Parent pid tracking is added for appolly/app/svc/svc.go and discover/matcher.go with the DynamicSelectorPID field.

Summary

Describe the change briefly.

Validation

• I have read and followed the contributing guidelines
• If this enhances / fixes / changes a core feature, I have updated the features documentation and support matrix as needed.

[codecov]

Codecov Report

❌ Patch coverage is 68.18182% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.27%. Comparing base (db7eae0) to head (e83774c).
⚠️ Report is 19 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/netolly/agent/pipeline.go	40.00%	2 Missing and 1 partial ⚠️
pkg/statsolly/agent/pipeline.go	40.00%	2 Missing and 1 partial ⚠️
pkg/appolly/discover/finder.go	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2421      +/-   ##
==========================================
+ Coverage   67.77%   69.27%   +1.50%     
==========================================
  Files         320      332      +12     
  Lines       42409    44207    +1798     
==========================================
+ Hits        28741    30624    +1883     
+ Misses      12043    11690     -353     
- Partials     1625     1893     +268     

Flag	Coverage Δ
integration-test	51.05% <36.84%> (+3.78%)	⬆️
integration-test-arm	28.87% <13.63%> (+0.65%)	⬆️
integration-test-vm-5.15-lts	?
integration-test-vm-6.18-lts	?
k8s-integration-test	34.93% <26.31%> (-2.95%)	⬇️
oats-test	36.49% <15.78%> (+<0.01%)	⬆️
unittests	62.55% <78.94%> (+0.54%)	⬆️

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[mariomac]

LGTM!

[grcevski]

LGTM!

[Copilot]

Pull request overview

This PR advances the DynamicSelector “signal ownership” work by wiring signal-specific PID selector views into the NetO11y and StatsO11y pipelines, and by starting to propagate an “owner PID” (DynamicSelectorPID) through AppO11y discovery into service attributes for downstream lifecycle consumers.

Changes:

• Wire DynamicPIDSelector.NetworkMetrics() and .StatsMetrics() into the NetO11y/StatsO11y filter.ByDynamicPID stage to support per-signal PID ownership.
• Add DynamicSelectorPID to AppO11y discovery match results (ProcessMatch) and propagate it into svc.Attrs.
• Update AppO11y dynamic matcher plumbing to use the app-signals selector view (appSignals()) and add a basic assertion for DynamicSelectorPID in tests.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pkg/statsolly/agent/pipeline.go	Switch StatsO11y dynamic PID filtering to the StatsMetrics() selector view.
pkg/netolly/agent/pipeline.go	Switch NetO11y dynamic PID filtering to the NetworkMetrics() selector view.
pkg/appolly/discover/typer.go	Propagate ProcessMatch.DynamicSelectorPID into svc.Attrs.
pkg/appolly/discover/matcher.go	Extend ProcessMatch to carry DynamicSelectorPID for ownership tracking.
pkg/appolly/discover/matcher_test.go	Update dynamic matcher tests to use the app-signals view and assert DynamicSelectorPID.
pkg/appolly/discover/matcher_dynamic.go	Change dynamic matcher to operate on *dynamicPIDSignalView and set DynamicSelectorPID on dynamic matches.
pkg/appolly/discover/finder.go	Wire the app-signals dynamic selector view through finder components (process watcher + dynamic matcher).
pkg/appolly/app/svc/svc.go	Add DynamicSelectorPID to service attributes to support lifecycle ownership propagation.