feat: add employee news links parsing and storage

migrations/007_employee_news_links.sql

@@ -0,0 +1,27 @@
+CREATE TABLE IF NOT EXISTS employee_news_links (
+  id SERIAL PRIMARY KEY,
+  employee_id INTEGER NOT NULL REFERENCES employees(id) ON DELETE CASCADE,
+  title TEXT NOT NULL,
+  url TEXT,
+  summary TEXT,
+  published_at TIMESTAMPTZ,
+  published_year INTEGER,
+  source_hash VARCHAR(64) NOT NULL,
+  raw_data JSONB,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  CONSTRAINT uq_employee_news_links_employee_url UNIQUE (employee_id, url),
+  CONSTRAINT uq_employee_news_links_employee_source_hash UNIQUE (employee_id, source_hash)
+);
+
+CREATE INDEX IF NOT EXISTS ix_employee_news_links_employee_id
+  ON employee_news_links (employee_id);
+
+CREATE INDEX IF NOT EXISTS ix_employee_news_links_url
+  ON employee_news_links (url);
+
+CREATE INDEX IF NOT EXISTS ix_employee_news_links_published_at
+  ON employee_news_links (published_at);
+
+CREATE INDEX IF NOT EXISTS ix_employee_news_links_published_year
+  ON employee_news_links (published_year);