[koushik4475]

Description

Closes #3

This PR implements pluggable runtime telemetry exporters as requested in issue #3:

• Base TelemetryExporter abstraction with pluggable export interface.
• PrometheusExporter supporting standard Prometheus text format gauges and counters for engine status, uptime, and heap/RSS memory.
• OpenTelemetryExporter outputting OpenTelemetry v0.1.0 ResourceMetrics compliant metric payloads.
• TelemetryManager allowing registration, dynamic dispatch, and parallel aggregation across all enabled exporters.
• Complete test coverage across format validation, schema compliance, and manager collection.

Co-authored-by: codedude1010 emailsendervisionexus@gmail.com