feat(intraday): add discovery and verification watch pipeline

db/migrations/017_intraday_news_candidates.sql

@@ -0,0 +1,106 @@
+-- 日内新闻候选与验证持久化结构
+
+CREATE TABLE IF NOT EXISTS intraday_news_candidate (
+    id BIGSERIAL PRIMARY KEY,
+    candidate_date DATE NOT NULL,
+    discovered_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    event_type TEXT NOT NULL,
+    provider_name TEXT NOT NULL,
+    model_name TEXT,
+    provider_country TEXT,
+    title TEXT NOT NULL,
+    summary TEXT,
+    candidate_urls JSONB NOT NULL DEFAULT '[]'::jsonb,
+    discovery_source TEXT NOT NULL,
+    discovery_query TEXT,
+    discovery_evidence JSONB NOT NULL DEFAULT '{}'::jsonb,
+    normalized_key TEXT NOT NULL,
+    status TEXT NOT NULL DEFAULT 'candidate',
+    verification_confidence TEXT NOT NULL DEFAULT 'candidate',
+    verification_notes TEXT,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'chk_intraday_news_candidate_status'
+    ) THEN
+        ALTER TABLE intraday_news_candidate
+            ADD CONSTRAINT chk_intraday_news_candidate_status
+            CHECK (status IN ('candidate', 'verifying', 'verified', 'rejected', 'stale'));
+    END IF;
+
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'chk_intraday_news_candidate_confidence'
+    ) THEN
+        ALTER TABLE intraday_news_candidate
+            ADD CONSTRAINT chk_intraday_news_candidate_confidence
+            CHECK (verification_confidence IN ('candidate', 'secondary_confirmed', 'official_confirmed'));
+    END IF;
+END
+$$;
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_intraday_news_candidate_normalized_key
+    ON intraday_news_candidate(normalized_key);
+CREATE INDEX IF NOT EXISTS idx_intraday_news_candidate_date
+    ON intraday_news_candidate(candidate_date DESC, discovered_at DESC);
+CREATE INDEX IF NOT EXISTS idx_intraday_news_candidate_status
+    ON intraday_news_candidate(status);
+CREATE INDEX IF NOT EXISTS idx_intraday_news_candidate_provider_event
+    ON intraday_news_candidate(provider_name, event_type, candidate_date DESC);
+
+COMMENT ON TABLE intraday_news_candidate IS '搜索引擎与 LLM 发现的日内新闻候选池，尚未直接进入正式日报事实层';
+COMMENT ON COLUMN intraday_news_candidate.candidate_urls IS '候选来源 URL 数组，按发现层输出原样保留';
+COMMENT ON COLUMN intraday_news_candidate.discovery_evidence IS '发现阶段原始证据 JSONB，例如搜索命中、LLM 归纳结果';
+COMMENT ON COLUMN intraday_news_candidate.normalized_key IS '同日同事件的去重键，避免重复发现候选';
+
+CREATE TABLE IF NOT EXISTS intraday_news_verification (
+    id BIGSERIAL PRIMARY KEY,
+    candidate_id BIGINT NOT NULL REFERENCES intraday_news_candidate(id) ON DELETE CASCADE,
+    verified_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    verifier_source TEXT NOT NULL,
+    verifier_url TEXT,
+    verifier_status TEXT NOT NULL,
+    extracted_facts JSONB NOT NULL DEFAULT '{}'::jsonb,
+    notes TEXT,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'chk_intraday_news_verification_status'
+    ) THEN
+        ALTER TABLE intraday_news_verification
+            ADD CONSTRAINT chk_intraday_news_verification_status
+            CHECK (verifier_status IN ('matched', 'contradicted', 'insufficient', 'error'));
+    END IF;
+END
+$$;
+
+CREATE INDEX IF NOT EXISTS idx_intraday_news_verification_candidate_verified_at
+    ON intraday_news_verification(candidate_id, verified_at DESC);
+CREATE INDEX IF NOT EXISTS idx_intraday_news_verification_source
+    ON intraday_news_verification(verifier_source);
+CREATE INDEX IF NOT EXISTS idx_intraday_news_verification_status
+    ON intraday_news_verification(verifier_status);
+
+COMMENT ON TABLE intraday_news_verification IS '日内新闻候选的验证轨迹，记录验证来源、状态和提取事实';
+COMMENT ON COLUMN intraday_news_verification.extracted_facts IS '验证阶段提取出的结构化事实 JSONB';
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1
+        FROM pg_trigger
+        WHERE tgname = 'intraday_news_candidate_updated_at'
+    ) THEN
+        CREATE TRIGGER intraday_news_candidate_updated_at
+        BEFORE UPDATE ON intraday_news_candidate
+        FOR EACH ROW
+        EXECUTE FUNCTION update_updated_at_column();
+    END IF;
+END
+$$;