v0.2.0

Added

• Exponential backoff retries for failed ingest uploads (1s, 4s, 16s).
• sdk_telemetry metadata in CE batch payloads.
• Explicit drop-after-retries warning behaavior.
• Local pre-arm triggers: slow_success, in_flight_pileup, retry_onset.
• Downstream edge key resolution with tiered quality levels.
• Ring buffer with pre-alert capture ordering.
• Serverless support with flush-before-exit.
• Auto-instrument module for zero-config setup.