phase 14-15: docker build validation and helm deployment

infra/migrations/008_trend_evidence.sql

@@ -0,0 +1,23 @@
+-- Stonks Oracle - Trend evidence mappings
+-- Links trend_windows to the documents that contributed as evidence,
+-- storing the evidence type (supporting/opposing), rank score, and
+-- weight breakdown for explainability and drill-down queries.
+-- Requirements: 6.5, 10.4
+
+CREATE TABLE trend_evidence (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    trend_window_id UUID NOT NULL REFERENCES trend_windows(id) ON DELETE CASCADE,
+    document_id UUID NOT NULL,
+    evidence_type VARCHAR(20) NOT NULL DEFAULT 'supporting',  -- supporting | opposing
+    rank_score FLOAT DEFAULT 0.0,
+    weight_component FLOAT DEFAULT 0.0,
+    impact_component FLOAT DEFAULT 0.0,
+    recency_component FLOAT DEFAULT 0.0,
+    confidence_component FLOAT DEFAULT 0.0,
+    sentiment_value FLOAT DEFAULT 0.0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_trend_evidence_trend ON trend_evidence(trend_window_id);
+CREATE INDEX idx_trend_evidence_doc ON trend_evidence(document_id);
+CREATE INDEX idx_trend_evidence_type ON trend_evidence(trend_window_id, evidence_type);