[MEX-965] farms & staking reward per second

[claudiulataretu]

Reasoning

• Farm V2 and staking smart contracts have migrated from block-based reward distribution to time-based (per-second) reward distribution
• The service layer needs to match the updated contract endpoints (getPerSecondRewardAmount, getLastRewardTimestamp) replacing the old block-based ones (getPerBlockRewardAmount, getLastRewardBlockNonce)
• Farm V1.x contracts remain block-based and are intentionally unchanged

Proposed Changes

• Add SECONDS_IN_YEAR, SECONDS_IN_WEEK, SECONDS_IN_DAY constants and rename staking gas config key
• Update V2 farm and staking ABI JSON files with new per-second endpoints
• Migrate staking module: model, ABI service, compute service, setter, transactions, and resolver to per-second rewards
• Migrate farm V2 module: model, ABI service (with guards that throw on block-based calls), compute service (including computeAnualRewardsUSD override), setter with new cache key methods
• Update state sync services and dex-state microservice compute services
• Update cache warmers with V1/V2 branching logic to call the correct setter methods per farm version
• Update proto definitions, mocks, and test files

How to test

• Verify staking APR calculations return correct values using per-second reward rates
• Verify farm V2 APR and boosted rewards calculations use time-based logic
• Verify farm V1.x farms continue to work with block-based logic unchanged
• Verify cache warmers correctly branch between V1 (block-based) and V2 (time-based) setters
• Verify calling rewardsPerBlock() on a V2 farm instance throws a clear error

[codecov]

Codecov Report

❌ Patch coverage is 25.92593% with 80 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.87%. Comparing base (cb3f8a9) to head (a43d64e).
⚠️ Report is 27 commits behind head on feat/state-rpc.

Files with missing lines	Patch %	Lines
...odules/farm/v2/services/farm.v2.compute.service.ts	0.00%	20 Missing ⚠️
...rc/modules/farm/v2/services/farm.v2.abi.service.ts	11.11%	16 Missing ⚠️
...odules/staking/services/staking.compute.service.ts	60.71%	11 Missing ⚠️
src/common.app.module.ts	9.09%	8 Missing and 2 partials ⚠️
...rc/modules/staking/services/staking.abi.service.ts	22.22%	7 Missing ⚠️
...es/analytics/services/analytics.compute.service.ts	44.44%	5 Missing ⚠️
src/modules/farm/mocks/farm.v2.abi.service.mock.ts	20.00%	4 Missing ⚠️
src/modules/pair/services/pair.abi.service.ts	0.00%	3 Missing ⚠️
.../modules/staking/mocks/staking.abi.service.mock.ts	0.00%	2 Missing ⚠️
src/modules/farm/v2/services/farm.v2.service.ts	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@                Coverage Diff                 @@
##           feat/state-rpc    #1745      +/-   ##
==================================================
- Coverage           54.02%   53.87%   -0.15%     
==================================================
  Files                 302      302              
  Lines               14402    14434      +32     
  Branches             1926     1935       +9     
==================================================
- Hits                 7780     7776       -4     
+ Misses               6616     6353     -263     
- Partials                6      305     +299     

Flag	Coverage Δ
unittests	53.87% <25.92%> (-0.15%)	⬇️

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