feat/add_deriv_positions_example

[aarmoa]

• Added example for liquidable positions request
• Removed sentry nodes from the valid network configs

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (0b3b17b) 56.28% compared to head (87b0af7) 56.50%.

Additional details and impacted files

@@ Coverage Diff @@## dev #255 +/- ##
==========================================
+ Coverage 56.28% 56.50% +0.22% 
==========================================
Files 17 17 Lines 2038 2030 -8 Branches 241 240 -1 ==========================================
Hits 1147 1147 Misses 855 855 + Partials 36 28 -8 

Files	Coverage Δ
pyinjective/core/network.py	40.64% <ø> (+1.66%)	⬆️

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.