Forward telemetry config to kernel backend

[jay-xiao446]

Summary

• disable Go wrapper telemetry for all kernel-backed connections
• thread enableTelemetry, telemetry_batch_size, and driver/runtime identity into kernel config
• update kernel telemetry docs and unit coverage

Tests

• go test ./...
• go test ./telemetry
• go test -run 'TestBuildKernelConfig|TestKernelConfigFieldsClassified|TestKernelSkipsDriverTelemetry' .

Note: the current kernel C ABI does not yet expose telemetry setters, so this PR wires and tests the Go-side config shape for the future kernel handoff without adding a non-linkable cgo call.

[peco-review-bot]

Verdict: 1 Medium

Looks good overall — the telemetry-skip logic, kernel config forwarding, and unit coverage are coherent and the doc updates match the new behavior. One medium maintainability concern: removing the RecordConnectionConfig call leaves kernel_telemetry.go (and its helpers) as dead production code reachable only from its test.

Other findings

• 🟡 Medium — This PR removes the sole production caller of kernelConnectionTelemetry — the conn.telemetry.RecordConnectionConfig(ctx, conn.id, kernelConnectionTelemetry(c.cfg)) block that previously lived in connector.go. After this change, kernelConnectionTelemetry (and its transitive helpers kernelUsesProxy / kernelAuthMech that are only reached through it) are referenced only from kernel_telemetry_test.go. That makes the whole kernel_telemetry.go file dead production code: it builds the DriverConnectionParameters telemetry payload that nothing emits anymore, and staticcheck's unused-code check won't flag it because the test still references it.

Since the kernel path now skips the Go telemetry interceptor entirely, this connection-config payload is never produced. Either delete kernel_telemetry.go (and its test), or, if it's being kept as scaffolding for the future kernel handoff, add a comment stating that and note it's intentionally test-only for now. As-is it reads as live code and will mislead the next reader into thinking kernel connection-config telemetry is still emitted.