feat: add block time config in reward supplier

[noa-starkware]

This change is 

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Note

Medium Risk
Adds new on-chain configuration and a governor-only setter to the RewardSupplier, changing contract storage/ABI and introducing new validation paths that could impact reward calculations if misconfigured.

Overview
Adds configurable block-duration bounds to RewardSupplier. Introduces a stored BlockDurationConfig (with defaults) plus new get_block_duration_config and governor-only set_block_duration_config entrypoints, including validation and a new INVALID_MIN_MAX_BLOCK_DURATION error.

Updates deployment/test utilities to provision the app-governor role for the reward supplier, adds contract tests for the new getter/setter and their access-control/validation behavior, and documents the new API/types/errors in docs/spec.md.

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[noa-starkware]

Reviewable status: 0 of 6 files reviewed, 1 unresolved discussion (waiting on @NirLevi-starkware)

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src/reward_supplier/interface.cairo line 123 at r1 (raw file):

/// Configuration for block duration calculation.
#[derive(Debug, Copy, Drop, Serde, PartialEq, starknet::Store)]
pub struct BlockDurationConfig {

Do we prefer tuple?

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.81%. Comparing base (f3267d6) to head (fb344f6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #67      +/-   ##
==========================================
+ Coverage   95.78%   95.81%   +0.02%     
==========================================
  Files          42       42              
  Lines       10299    10342      +43     
==========================================
+ Hits         9865     9909      +44     
+ Misses        434      433       -1     

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[remollemo]

@remollemo reviewed 6 files and all commit messages, and made 2 comments.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on NirLevi-starkware and noa-starkware).

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src/reward_supplier/interface.cairo line 123 at r1 (raw file):

Previously, noa-starkware wrote…

Do we prefer tuple?

i think a struct is good.