chore(deps): bump ccxt from 4.4.87 to 4.4.88

Bumps [ccxt](https://github.com/ccxt/ccxt) from 4.4.87 to 4.4.88.
- [Release notes](https://github.com/ccxt/ccxt/releases)
- [Changelog](https://github.com/ccxt/ccxt/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ccxt/ccxt/compare/v4.4.87...v4.4.88)

---
updated-dependencies:
- dependency-name: ccxt
  dependency-version: 4.4.88
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -4,7 +4,7 @@ bottleneck==1.4.2
 numexpr==2.10.2
 ft-pandas-ta==0.3.15
 
-ccxt==4.4.87
+ccxt==4.4.88
 cryptography==45.0.3
 aiohttp==3.12.6
 SQLAlchemy==2.0.41