Acquisition core refactor (Phase 1 of 4): single-loop acquisition, decoupled tracking, design for recording/focus/UI phases#1

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refactor/acquisition-core-adr0001

Commits on Jun 21, 2026

docs: acquisition refactor design (CONTEXT, ADRs 0001-0003, Phase 1 plan)

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test: add pytest harness and core package skeleton

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feat: add Frame/AcquiredPair types and thread-safe FrameHub

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feat: add Camera interface and FakeCamera test double

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feat: add Stage interface, clamp helper, Null/Fake stages

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feat: add AcquisitionEngine with shared monotonic frame index

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feat: add pure tracking helpers and Tracker thread

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feat: add ZaberStage adapter with graceful connect-once fallback

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feat: add SpinnakerCamera adapter configured as the acquisition clock

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refactor: own acquisition at startup; serve display from FrameHub (ADR 0001)

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docs: Phase 2 recording-integrity plan (ADR 0003)

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docs: Phase 3 (control + Hold Focus) and Phase 4 (status + UI) plans

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docs: note accepted Phase 1 regression and insertion-order fix in plan

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