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This commit addresses the massive context loss and 0% utilization issue by fixing two related bugs in the context management system: 1. **Masked Tool Retention Bug:** Removed the brittle 'in-flight' protection logic from `getProtectedNodeIds`. Previously, this logic failed to match `MASKED_TOOL` nodes, causing it to perpetually hoard `functionCall` nodes inside the protected list. This hoarding rapidly exhausted the context budget, forcing the GC backstop into an aggressive death spiral. Now, only the `recent_turn` and explicit tasks are protected, allowing standard GC to naturally prune old tool calls (and the `HistoryHardener` handles the rest). 2. **Adaptive Calculator Overhead Bug:** The `AdaptiveTokenCalculator` was calculating ratio drift by dividing the API's `actualTokens` (which includes the static overhead of the System Instruction and Tools) by the graph's `baseUnits` (which only counts history). We now inject an `getOverheadTokens` callback during initialization, allowing the calculator to subtract the overhead from the Gemini API count before dividing by the base units, achieving an accurate apples-to-apples ratio. 3. **Violent Oscillation Dampening:** Introduced strict dampening bounds (`maxStep` limit and a hard `targetWeight` clamp) to the Adaptive Token Calculator's EMA. This acts identically to a machine learning learning-rate limit, ensuring that a single massive outlier reading cannot violently thrash the `learnedWeight` multiplier in a single turn. Includes new test coverage verifying the maxStep logic and overhead subtraction. Also removed an unsafe `as unknown` cast in the `snapshotGenerator` that failed `eslint`.