Make user_agent_suffix a proper config value

[liquidsec]

implements #2209

[github-actions]

📊 Performance Benchmark Report

Comparing 3.0 (baseline) vs user-agent-suffix-is-a-real-boy-now (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	4.24ms	4.23ms	-0.1% ⚪	✅
Bloom Filter Large Scale Dns Brute Force	17.65ms	17.57ms	-0.4% ⚪	✅
Large Closest Match Lookup	356.14ms	376.33ms	+5.7% ⚪	✅
Realistic Closest Match Workload	191.70ms	198.26ms	+3.4% ⚪	✅
Event Validation Full Scan Startup Small Batch	496.29ms	495.65ms	-0.1% ⚪	✅
Event Validation Full Scan Startup Large Batch	776.05ms	764.37ms	-1.5% ⚪	✅
Make Event Autodetection Small	31.34ms	31.35ms	+0.0% ⚪	✅
Make Event Autodetection Large	316.18ms	319.79ms	+1.1% ⚪	✅
Make Event Explicit Types	13.85ms	14.14ms	+2.1% ⚪	✅
Excavate Single Thread Small	4.137s	4.099s	-0.9% ⚪	✅
Excavate Single Thread Large	9.841s	10.181s	+3.5% ⚪	✅
Excavate Parallel Tasks Small	4.293s	4.252s	-1.0% ⚪	✅
Excavate Parallel Tasks Large	7.391s	7.372s	-0.3% ⚪	✅
Is Ip Performance	3.17ms	3.19ms	+0.4% ⚪	✅
Make Ip Type Performance	11.48ms	11.36ms	-1.1% ⚪	✅
Mixed Ip Operations	4.47ms	4.50ms	+0.7% ⚪	✅
Typical Queue Shuffle	62.51µs	61.11µs	-2.2% ⚪	✅
Priority Queue Shuffle	712.77µs	700.50µs	-1.7% ⚪	✅

🎯 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 85.71429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92%. Comparing base (389b8aa) to head (7c95b33).
⚠️ Report is 18 commits behind head on 3.0.

Files with missing lines	Patch %	Lines
bbot/scanner/preset/args.py	75%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             3.0   #2949   +/-   ##
=====================================
+ Coverage     92%     92%   +1%     
=====================================
  Files        436     436           
  Lines      35642   35637    -5     
=====================================
+ Hits       32504   32525   +21     
+ Misses      3138    3112   -26     

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