feat: add detailed employee publications storage and MCP docs

migrations/006_employee_publications.sql

@@ -0,0 +1,39 @@
+CREATE TABLE IF NOT EXISTS employee_publications (
+  id SERIAL PRIMARY KEY,
+  employee_id INTEGER NOT NULL REFERENCES employees(id) ON DELETE CASCADE,
+  publication_id VARCHAR(64),
+  title TEXT NOT NULL,
+  year INTEGER,
+  publication_type VARCHAR(64),
+  language VARCHAR(16),
+  status INTEGER,
+  url TEXT,
+  doi_url TEXT,
+  other_url TEXT,
+  document_url TEXT,
+  citation_text TEXT,
+  annotation JSONB,
+  description JSONB,
+  authors JSONB,
+  raw_data JSONB,
+  source_hash VARCHAR(64) NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  CONSTRAINT uq_employee_publications_employee_publication UNIQUE (employee_id, publication_id),
+  CONSTRAINT uq_employee_publications_employee_source_hash UNIQUE (employee_id, source_hash)
+);
+
+CREATE INDEX IF NOT EXISTS ix_employee_publications_employee_id
+  ON employee_publications (employee_id);
+
+CREATE INDEX IF NOT EXISTS ix_employee_publications_publication_id
+  ON employee_publications (publication_id);
+
+CREATE INDEX IF NOT EXISTS ix_employee_publications_doi_url
+  ON employee_publications (doi_url);
+
+CREATE INDEX IF NOT EXISTS ix_employee_publications_year
+  ON employee_publications (year);
+
+CREATE INDEX IF NOT EXISTS ix_employee_publications_publication_type
+  ON employee_publications (publication_type);