Add pprof profiling support to Go template

[mirfmaster]

tl;dr: Install github.com/labstack/echo-contrib/pprof and guard it behind an env flag so we don’t accidentally expose it in prod.

Description:
Right now we only have tracing, logs, and metrics wired up. Profiling is the missing piece for spotting performance issues before they hit production.

By integrating profiling tools, we can reduce debugging time for performance issue.

Proposed Solutions:

• Added package for github.com/labstack/echo-contrib/pprof, its already cover the cpu, memory, block profiler.
• Rename file from config/instrumentation.go to config/observability.go
• Rename function from ApplyInstrumentation to ApplyObservability
• Add function for ApplyProfiling
• Enable only when ENABLE_PROFILING=true and APP_ENV != production