feat: report classified controller metrics

[sbalabanov]

• use process.start/process.finish lifecycle metrics for controller counts, latency, and result=success|error|cancel while removing duplicate counters
• allow Complete() to accept tags accumulated during execution, keeping Begin() tags on both lifecycle metrics and completion tags on finish
• add origin=infra|infra_retryable|user and dependency=yes|no only after the configured error processor classifies a failure

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