[codex] Remove OpenTelemetry npm dependencies

[philcunliffe]

Summary

• Remove all direct @opentelemetry npm dependencies and prune the lockfile.
• Replace the previous OpenTelemetry SDK wiring with a small local observability runtime that preserves spans, active context, logs, metrics, JSONL dev telemetry, and OTLP/HTTP export.
• Update plugin and core call sites to use the local observability facade instead of importing @opentelemetry/api directly.

Impact

The package no longer installs the OpenTelemetry npm stack. The developer telemetry contract remains available through the existing HypAware observability helpers.

Validation

• rg "@opentelemetry" package.json package-lock.json src hypaware-core collectivus --glob "!node_modules/**"
• npm ls --all
• node --check src/core/observability/runtime.js
• node --check src/core/observability/otlp_exporters.js
• node --check src/core/cli/dispatch.js
• node --check hypaware-core/plugins-workspace/format-jsonl/src/index.js
• node --check hypaware-core/plugins-workspace/format-parquet/src/index.js
• node --check hypaware-core/plugins-workspace/otel/src/collector.js
• npm run smoke -- core_boot_noop
• npm run smoke -- command_dispatch
• npm run smoke -- local_parquet_export
• npm run smoke -- otel_loopback_capture
• npm run smoke -- ai_gateway_passthrough
• npm run smoke -- blob_sink_parquet_local_fs