Add esi lightfuzz submodule

[liquidsec]

Adds a module to detect exploitable edge side includes, by injecting an ESI tag and an arbitrary tag, and looking for cases where just the ESI tag is removed.

[github-actions]

📊 Performance Benchmark Report

Comparing dev (baseline) vs esi-research (current)

📈 Detailed Results (All Benchmarks)

📋 Complete results for all benchmarks - includes both significant and insignificant changes

🧪 Test Name	📏 Base	📏 Current	📈 Change	🎯 Status
Bloom Filter Dns Mutation Tracking Performance	4.26ms	4.26ms	+0.1% ⚪	✅
Bloom Filter Large Scale Dns Brute Force	17.95ms	18.04ms	+0.5% ⚪	✅
Large Closest Match Lookup	369.52ms	365.57ms	-1.1% ⚪	✅
Realistic Closest Match Workload	198.61ms	196.67ms	-1.0% ⚪	✅
Event Validation Full Scan Startup Small Batch	456.43ms	464.60ms	+1.8% ⚪	✅
Event Validation Full Scan Startup Large Batch	812.25ms	814.64ms	+0.3% ⚪	✅
Make Event Autodetection Small	31.48ms	31.09ms	-1.2% ⚪	✅
Make Event Autodetection Large	323.46ms	321.30ms	-0.7% ⚪	✅
Make Event Explicit Types	14.26ms	14.06ms	-1.4% ⚪	✅
Excavate Single Thread Small	4.119s	4.080s	-0.9% ⚪	✅
Excavate Single Thread Large	9.641s	9.626s	-0.2% ⚪	✅
Excavate Parallel Tasks Small	4.347s	4.334s	-0.3% ⚪	✅
Excavate Parallel Tasks Large	7.255s	7.214s	-0.6% ⚪	✅
Is Ip Performance	3.18ms	3.24ms	+1.8% ⚪	✅
Make Ip Type Performance	11.44ms	11.59ms	+1.3% ⚪	✅
Mixed Ip Operations	4.53ms	4.58ms	+1.1% ⚪	✅
Typical Queue Shuffle	62.76µs	63.02µs	+0.4% ⚪	✅
Priority Queue Shuffle	685.84µs	709.64µs	+3.5% ⚪	✅

🎯 Performance Summary

✅ No significant performance changes detected (all changes <10%)

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🐍 Python Version 3.11.14

[codecov]

Codecov Report

❌ Patch coverage is 95.74468% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 92%. Comparing base (da68c05) to head (0d96f82).
⚠️ Report is 14 commits behind head on dev.

Files with missing lines	Patch %	Lines
.../test_step_2/module_tests/test_module_lightfuzz.py	94%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #2784   +/-   ##
=====================================
+ Coverage     92%     92%   +1%     
=====================================
  Files        410     411    +1     
  Lines      33933   33980   +47     
=====================================
+ Hits       30968   31027   +59     
+ Misses      2965    2953   -12     

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