Chain upgradability fixes

[iTiky]

Storing last unique ID in a genesis for x/tracking and x/rewards objects; app EndBlocker fix

[codecov]

Codecov Report

Base: 63.98% // Head: 64.06% // Increases project coverage by +0.08% 🎉

Coverage data is based on head (994b68a) compared to base (f4a66ef).
Patch coverage: 60.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #218      +/-   ##
==========================================
+ Coverage   63.98%   64.06%   +0.08%     
==========================================
  Files          59       59              
  Lines        2360     2382      +22     
==========================================
+ Hits         1510     1526      +16     
- Misses        784      790       +6     
  Partials       66       66              

Impacted Files	Coverage Δ
x/rewards/types/genesis.go	64.81% <26.31%> (+0.98%)	⬆️
x/tracking/types/genesis.go	71.42% <55.55%> (ø)
app/app.go	91.05% <100.00%> (ø)
x/rewards/keeper/genesis.go	100.00% <100.00%> (ø)
x/rewards/keeper/invariants.go	100.00% <100.00%> (ø)
x/rewards/keeper/state_rewards_record.go	85.26% <100.00%> (-0.31%)	⬇️
x/tracking/keeper/genesis.go	100.00% <100.00%> (ø)
x/tracking/keeper/state_contract_op.go	95.18% <100.00%> (-0.12%)	⬇️
x/tracking/keeper/state_tx_info.go	95.12% <100.00%> (-0.12%)	⬇️

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[edjroz]

kickass as usual 🚀 🤘