add tags

backend/internal/db/migrations/003_tags.down.sql

@@ -0,0 +1,3 @@
+DROP TABLE IF EXISTS file_tags;
+
+DROP TABLE IF EXISTS tags;

backend/internal/db/migrations/003_tags.up.sql

@@ -0,0 +1,19 @@
+-- VaultDrop 003: tags table
+
+CREATE TABLE tags (
+  id          TEXT PRIMARY KEY NOT NULL DEFAULT gen_random_uuid(),
+  parent_tag_id TEXT,  
+  tag_name    TEXT NOT NULL, -- exemple: Brice, vélo, facture ...
+  tag_type    TEXT NOT NULL DEFAULT 'none', -- exemple: entity, none, folder
+  created_at  TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at  TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  CONSTRAINT fk_parent_tag FOREIGN KEY(parent_tag_id) REFERENCES tags(id)
+);
+
+CREATE TABLE file_tags (
+  id TEXT PRIMARY KEY NOT NULL DEFAULT gen_random_uuid(),
+  tag_id TEXT,
+  file_id TEXT,
+  CONSTRAINT fk_tag FOREIGN KEY(tag_id) REFERENCES tags(id),
+  CONSTRAINT fk_file FOREIGN KEY(file_id) REFERENCES files(id)
+)