backend: correspondents

backend/migrations/202503200001_add_correspondents/down.sql

@@ -0,0 +1,5 @@
+DROP INDEX IF EXISTS idx_document_correspondents_role;
+DROP INDEX IF EXISTS idx_document_correspondents_correspondent;
+DROP INDEX IF EXISTS idx_document_correspondents_document;
+DROP TABLE IF EXISTS document_correspondents;
+DROP TABLE IF EXISTS correspondents;

backend/migrations/202503200001_add_correspondents/up.sql

@@ -0,0 +1,27 @@
+CREATE TABLE correspondents (
+    id UUID PRIMARY KEY,
+    name VARCHAR(255) NOT NULL,
+    metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    CONSTRAINT correspondents_name_unique UNIQUE (name)
+);
+
+CREATE TABLE document_correspondents (
+    document_id UUID NOT NULL REFERENCES documents(id) ON DELETE CASCADE,
+    correspondent_id UUID NOT NULL REFERENCES correspondents(id) ON DELETE CASCADE,
+    role VARCHAR(32) NOT NULL,
+    assigned_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    assigned_by UUID REFERENCES users(id),
+    PRIMARY KEY (document_id, correspondent_id, role),
+    CONSTRAINT document_correspondents_role_check CHECK (role IN ('sender', 'receiver', 'other'))
+);
+
+CREATE INDEX idx_document_correspondents_document
+    ON document_correspondents(document_id);
+
+CREATE INDEX idx_document_correspondents_correspondent
+    ON document_correspondents(correspondent_id);
+
+CREATE INDEX idx_document_correspondents_role
+    ON document_correspondents(role);