fix: signer stacker query using string instead of int for cycle_id

[zone117x]

Stackers missing from the stacker endpoints because the cycle_id value in stacker queries was using a string instead of an int, e.g. '85' + 1 = '851'

[github-actions[bot]]

Vercel deployment URL: https://stacks-blockchain-kbq079ysv-blockstack.vercel.app :rocket:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 72.55%. Comparing base (f55483a) to head (576faf4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1991 +/- ## =========================================== + Coverage 72.54% 72.55% +0.01% =========================================== Files 94 94 Lines 12586 12591 +5 Branches 2878 2880 +2 =========================================== + Hits 9130 9135 +5 Misses 3438 3438 Partials 18 18 ```

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[blockstack-devops]

:tada: This PR is included in version 7.11.0-beta.9 :tada:

The release is available on:

• npm package (@beta dist-tag)
• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket:

[blockstack-devops]

:tada: This PR is included in version 7.11.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: