enhancement(agent-data-plane): update tag_filterlist transform to use mutable tagset view

[tobz]

Summary

This PR switches the tag_filterlist transform to use the "mutable tagset view" primitive for modifying tags in a more efficient way than using Context::with_tag_set_mut.

We also fixed a missing optimization with TagSetMutView where we weren't amortizing the cost of hashing the new context by reusing a PrehashedHashSet<u64> needed for order-oblivious tag hashing.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

How did you test this PR?

Existing unit tests.

References

AGTMETRICS-400

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Binary Size Analysis (Agent Data Plane)

Target: bdcdc6c (baseline) vs 11d5c9b (comparison) diff
Analysis Type: Stripped binaries (debug symbols excluded)
Baseline Size: 26.47 MiB
Comparison Size: 26.46 MiB
Size Change: -12.12 KiB (-0.04%)
Pass/Fail Threshold: +5%
Result: PASSED ✅

Changes by Module

Module	File Size	Symbols
agent_data_plane::components::tag_filterlist	-7.82 KiB	2
[Unmapped]	-4.89 KiB	1
saluki_context::tags::tagset	+1.84 KiB	5
smallvec	-960 B	1
hashbrown	-650 B	7
saluki_context::context::TagSetMutView	+385 B	1
[sections]	+177 B	5
unicode_segmentation	-88 B	1
idna	-77 B	1
axum	-66 B	1
core	-52 B	58
unsafe_libyaml	+44 B	1
ddsketch::agent::sketch	+5 B	1
serde_yaml	+2 B	5
protobuf	-1 B	2
agent_data_plane::cli::run	+1 B	1
saluki_core::data_model::event	+0 B	2
hickory_proto	+0 B	18
rustls	+0 B	12
webpki	+0 B	2

Detailed Symbol Changes

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  [NEW] +10.6Ki  [NEW] +10.5Ki    <saluki_core::data_model::event::Event as core::clone::Clone>::clone.9931
  [NEW] +5.52Ki  [NEW] +5.38Ki    <hickory_proto::rr::record_data::RData as core::clone::Clone>::clone.8378
  [NEW] +5.13Ki  [NEW] +5.00Ki    <hickory_proto::rr::record_data::RData as core::clone::Clone>::clone.11172
  [NEW] +4.71Ki  [NEW] +4.59Ki    <rustls::error::Error as core::clone::Clone>::clone.9909
  [NEW] +4.71Ki  [NEW] +4.59Ki    <rustls::error::Error as core::clone::Clone>::clone.11187
  [NEW] +3.83Ki  [NEW] +3.71Ki    <webpki::error::Error as core::fmt::Debug>::fmt.11365
  [NEW] +3.66Ki  [NEW] +3.54Ki    <rustls::error::Error as core::fmt::Debug>::fmt.9534
  [NEW] +3.57Ki  [NEW] +3.45Ki    <rustls::error::Error as core::fmt::Debug>::fmt.11188
  [NEW] +2.81Ki  [NEW] +2.69Ki    <figment::error::Error as core::clone::Clone>::clone.7766
  +0.0%    +607  +0.1%    +738    [457 Others]
  [DEL] -2.81Ki  [DEL] -2.69Ki    <figment::error::Error as core::clone::Clone>::clone.7805
  [DEL] -3.57Ki  [DEL] -3.45Ki    <rustls::error::Error as core::fmt::Debug>::fmt.11223
  [DEL] -3.66Ki  [DEL] -3.54Ki    <rustls::error::Error as core::fmt::Debug>::fmt.9573
  [DEL] -3.83Ki  [DEL] -3.71Ki    <webpki::error::Error as core::fmt::Debug>::fmt.11400
  [DEL] -4.71Ki  [DEL] -4.59Ki    <rustls::error::Error as core::clone::Clone>::clone.11222
  [DEL] -4.71Ki  [DEL] -4.59Ki    <rustls::error::Error as core::clone::Clone>::clone.9948
 -48.8% -4.89Ki  [ = ]       0    [Unmapped]
  [DEL] -5.13Ki  [DEL] -5.00Ki    <hickory_proto::rr::record_data::RData as core::clone::Clone>::clone.11207
  [DEL] -5.52Ki  [DEL] -5.38Ki    <hickory_proto::rr::record_data::RData as core::clone::Clone>::clone.8417
 -21.9% -7.83Ki -22.0% -7.83Ki    _<agent_data_plane::components::tag_filterlist::TagFilterlist as saluki_core::components::transforms::Transform>::run::_{{closure}}::hdeb7c7b5f55b83b1
  [DEL] -10.6Ki  [DEL] -10.5Ki    <saluki_core::data_model::event::Event as core::clone::Clone>::clone.9970
  -0.0% -12.1Ki  -0.0% -7.11Ki    TOTAL

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Regression Detector (Agent Data Plane)

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