L1 Physics Engine Duplicate Declarations and Telemetry Formatting Fix

[dcplatforms]

Consolidates duplicate declarations of safeFloat and handleDerAlarm inside services/01-physics-engine/index.js to fix SyntaxErrors and type discrepancies, resulting in 55/55 passing tests.

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PR created automatically by Jules for task 7254241289795422837 started by @dcplatforms

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Note

Medium Risk
Touches safety-lock activation on DER alarms and how physics/confidence scores are typed in alerts; behavior is mostly clarified but alarm input shape and score formatting paths changed.

Overview
Fixes duplicate safeFloat and handleDerAlarm declarations in the L1 physics engine that caused parse/syntax errors and inconsistent exports.

Telemetry helpers: safeFloat now returns a numeric float for Redis/site load math; a new safeFloatFormatted owns four-decimal string scores for calculateConfidenceScore, calculatePhysicsMetadata, and Kafka alert payloads. Tests were updated to assert formatting on safeFloatFormatted and parsing on safeFloat.

DER alarms: A single handleDerAlarm accepts either a parsed object or a Kafka-style message (input.value), normalizes alarmType/alarm_type and site id, and sets the site safety lock for CRITICAL/HIGH only.

Alerts: Physics alert site resolution prefers top-level payload keys, then metadata. Module exports drop duplicate entries and export safeFloatFormatted.

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