Fix JSON parsing failures from LLM responses with control characters

[KavyaSree2610]

• This PR fixes a bug where LLM responses containing literal control characters (tabs, carriage returns) or invalid escape sequences (e.g., \&) in JSON strings cause JSONDecodeError exhausting retries and failing the task.
• Adds a workflow_dispatch trigger in dockerBuildPush flow to allow manual runs from Github actions UI

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.30%. Comparing base (a68a96c) to head (13c336d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
+ Coverage   91.72%   92.30%   +0.58%     
==========================================
  Files          21       21              
  Lines         834      871      +37     
==========================================
+ Hits          765      804      +39     
+ Misses         69       67       -2     

Flag	Coverage Δ
integration	58.32% <4.76%> (-2.23%)	⬇️
ollama_local	65.09% <57.14%> (+0.46%)	⬆️
slow-browser	51.77% <4.76%> (-2.06%)	⬇️
slow-other	73.93% <66.66%> (+4.27%)	⬆️
unit	66.70% <100.00%> (+1.47%)	⬆️

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Files with missing lines	Coverage Δ
src/microbots/llm/anthropic_api.py	100.00% <100.00%> (ø)
src/microbots/llm/llm.py	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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