Logging improvements (Azure application insights, OpenTelemetry)

[spencer-crook]

Capture
User actions (uploads, doc conversion method, prompts / queries, prompt templates created / interactions)
Latency (per request, per model call)
Costs (tokens, API usage)
Errors + failures
Results performance etc

[Jordan-Leis]

Mostly finished. Still missing Azure Secrets and Tenant ID in order to finish connecting azure to dashboard.