fix: resolve dependency conflicts for semantic-kernel 1.39.4

Update azure-ai-projects 1.0.0b11 → 1.0.0b12 and openai 1.84.0 → 1.105.0
in requirements.txt to satisfy semantic-kernel 1.39.4 dependency constraints.

Co-authored-by: Roopan-Microsoft <168007406+Roopan-Microsoft@users.noreply.github.com>

Author: Copilot

src/backend/requirements.txt

@@ -15,8 +15,8 @@ opentelemetry-instrumentation-openai
 opentelemetry-exporter-otlp-proto-http
 
 semantic-kernel[azure]==1.39.4
-azure-ai-projects==1.0.0b11
-openai==1.84.0 
+azure-ai-projects==1.0.0b12
+openai==1.105.0
 azure-ai-inference==1.0.0b9 
 azure-search-documents 
 azure-ai-evaluation