-- Migration 062: Add pipeline_version to track which generation rules produced each control/chunk
--
-- v1 = Original pipeline (local LLM prefilter, old prompt without null-skip)
-- v2 = Improved pipeline (skip_prefilter, Anthropic decides relevance, annexes protected)
--
-- This allows identifying controls that may need reprocessing when pipeline rules change.

ALTER TABLE canonical_controls
    ADD COLUMN IF NOT EXISTS pipeline_version smallint NOT NULL DEFAULT 1;

ALTER TABLE canonical_processed_chunks
    ADD COLUMN IF NOT EXISTS pipeline_version smallint NOT NULL DEFAULT 1;

-- Index for efficient querying by version
CREATE INDEX IF NOT EXISTS idx_canonical_controls_pipeline_version
    ON canonical_controls (pipeline_version);

CREATE INDEX IF NOT EXISTS idx_canonical_processed_chunks_pipeline_version
    ON canonical_processed_chunks (pipeline_version);

COMMENT ON COLUMN canonical_controls.pipeline_version IS 'Generation pipeline version: 1=original (local prefilter), 2=improved (Anthropic decides relevance, annexes protected)';
COMMENT ON COLUMN canonical_processed_chunks.pipeline_version IS 'Pipeline version used when this chunk was processed';