Derive Liquidity Zone touch and reclaim entry signals

[sybapp]

What to build

Derive long entry Candidate Signals when a bullish Structure Event is followed by a valid bullish Liquidity Zone touch or reclaim confirmation. This should turn LuxAlgo ICT/SMC order block and fair value gap zones into a bounded, auditable entry confirmation path instead of using zone creation as an entry trigger.

Acceptance criteria

• A bullish Structure Event can activate a bounded waiting state for a bullish order block or fair value gap confirmation.
• Confirmation supports touch and reclaim modes as configurable strategy/template inputs.
• Zone validity uses close beyond the zone boundary as the first invalidation rule.
• If multiple valid zones exist, selection follows a configurable preference such as nearest-any, prefer-OB, or prefer-FVG.
• A single Liquidity Zone can trigger at most one entry attempt in the first version.
• Candidate Signal metadata records the structure event, selected zone, confirmation bar, and confirmation mode.
• Tests cover confirmed touch, confirmed reclaim, expired structure event, invalidated zone, and single-use zone behavior.

Blocked by

• Preserve LuxAlgo graphics as auditable Structural Features #22
• Derive directional Structure Event signals from LuxAlgo graphics #23