feat(nano): reduce NC_EVENT max size to 1KiB

[jansegre]

Motivation

The previous limit of 100KiB is high, especially because there's no way to select specific contracts when enabling NC_EVENTs.

Acceptance Criteria

• Reduce limit from 100KiB to 1KiB

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[github-actions]

Bencher Report

Branch	feat/reduce-nc-event-max-size
Testbed	ubuntu-22.04

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Benchmark	Latency	Benchmark Result minutes (m) (Result Δ%)	Lower Boundary minutes (m) (Limit %)	Upper Boundary minutes (m) (Limit %)
sync-v2 (up to 20000 blocks)	📈 view plot 🚷 view threshold	1.80 m (+7.56%) Baseline: 1.68 m	1.51 m (83.67%)	2.01 m (89.63%)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.86%. Comparing base (ee93952) to head (063a25a).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1394      +/-   ##
==========================================
- Coverage   85.90%   85.86%   -0.05%     
==========================================
  Files         430      430              
  Lines       32570    32570              
  Branches     5072     5072              
==========================================
- Hits        27979    27965      -14     
- Misses       3580     3592      +12     
- Partials     1011     1013       +2     

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