chore: Prohibit dependencies on included modules from causing unexpected version changes

[FrenchGithubUser]

No description provided.

[Copilot]

Pull request overview

Updates the Famedly Synapse addon image build to better control Python dependency resolution by introducing a pip constraints file derived from the base image environment.

Changes:

• Generate a constraints.txt via pip freeze during the image build.
• Apply -c constraints.txt when installing Synapse addons so transitive dependencies are constrained to the base image set.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.13%. Comparing base (24f1cc4) to head (97fa0b2).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
- Coverage   80.14%   80.13%   -0.01%     
==========================================
  Files         501      501              
  Lines       71549    71549              
  Branches    10751    10751              
==========================================
- Hits        57342    57339       -3     
- Misses      10947    10949       +2     
- Partials     3260     3261       +1     

see 2 files with indirect coverage changes

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