feat(fine-grain-fp): use fine grain data lineage to detect logic changes

[georgeh0]

fixes #1057

[Copilot]

Pull Request Overview

This PR implements fine-grained data lineage tracking to detect logic changes more precisely. Instead of using a single plan-wide fingerprint for all import operations, it introduces per-source fingerprinting that only considers the export operations that actually depend on each source.

• Introduces SourceLogicFingerprint to compute fingerprints based on which export operations use a specific source
• Adds FieldDefFingerprint to track data lineage through field definitions, recording which source operations contribute to each field
• Replaces the plan-level ExecutionPlanLogicFingerprint with two legacy fingerprint versions stored in a vector

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
rust/cocoindex/src/execution/indexing_status.rs	Adds SourceLogicFingerprint struct to compute per-source fingerprints based on dependent export operations
rust/cocoindex/src/execution/source_indexer.rs	Updates to use SourceLogicFingerprint instead of plan-level fingerprint for tracking source versions
rust/cocoindex/src/execution/row_indexer.rs	Changes parameter types to accept SourceLogicFingerprint in version comparison methods
rust/cocoindex/src/execution/evaluator.rs	Adds source_logic_fp field to SourceRowEvaluationContext
rust/cocoindex/src/execution/dumper.rs	Creates and threads SourceLogicFingerprint through evaluation logic
rust/cocoindex/src/builder/plan.rs	Adds FieldDefFingerprint struct and updates ExecutionPlan to use legacy fingerprints vector
rust/cocoindex/src/builder/flow_builder.rs	Updates flow builder to accept FieldDefFingerprint parameters (with incomplete implementation)
rust/cocoindex/src/builder/analyzer.rs	Implements fingerprint propagation logic through field paths, collectors, and operation analysis
rust/cocoindex/src/service/flows.rs	Updates service handlers to create and use SourceLogicFingerprint for evaluation contexts

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