deps(backend): update freqtrade requirement from >=2023.12 to >=2026.4 in /backend

[dependabot]

Updates the requirements on freqtrade to permit the latest version.

Release notes

Sourced from freqtrade's releases.

2026.4

Highlighted changes

• Add daily wallet balance history (including re-filling for existing history if possible).
• Updated backtest reports to additionally show balance based metrics (which includes unrealized profits).
• Add support for "Demo mode" for Bybit.
• freqAI: Tensorboard support for LightGBM models.
• Improved shutdown behavior - which should speed up clean shutdowns in certain scenarios.
• Add support for python 3.14 in setup scripts.
• Update Dockerfile to 3.14.

Sponsor

You can sponsor the work on freqtrade via the following links:

• froggleston (FTUI) https://github.com/sponsors/froggleston/
• robcaulk (freqAI) https://github.com/sponsors/robcaulk/
• xmatthias (freqtrade and freqUI): https://github.com/sponsors/xmatthias/

How to update

As always, you can update your bot using one of the following commands:

docker-compose

docker-compose pull
docker-compose up -d

Installation via setup script

# Deactivate venv and run 
./setup.sh --update

Plain native installation

git pull
pip install -U -r requirements.txt

d460eef57 chore: bump version to 2026.4
ad8dc57e9 chore: update binance leverage tiers
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Commits

• 281ba60 Merge pull request #13106 from freqtrade/new_release
• d460eef chore: bump version to 2026.4
• 6c2cd96 Merge branch 'stable' into new_release
• 2ea4c4d Merge pull request #13105 from freqtrade/update/binance-leverage-tiers
• ad8dc57 chore: update binance leverage tiers
• dd970f2 fix: rate can be None in balance migration
• 63819fa test: update test for unwatch_ohlcv adjustment
• bfe0586 feat: implement unwatchOHLCV
• 14d6610 Merge pull request #13104 from freqtrade/update/pre-commit-hooks
• afc00c5 chore: update pre-commit hooks
• Additional commits viewable in compare view

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