feat: initial commit

Axum/Postgres server with auth, migrations, and Docker setup.

migrations/20260812120000_create_workspaces.up.sql

@@ -0,0 +1,34 @@
+CREATE TYPE workspace_role AS ENUM ('owner', 'admin', 'member');
+
+CREATE TABLE workspaces (
+    id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name       TEXT NOT NULL,
+    slug       TEXT NOT NULL UNIQUE,
+    owner_id   UUID NOT NULL REFERENCES users(id),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    deleted_at TIMESTAMPTZ
+);
+
+CREATE TABLE workspace_members (
+    workspace_id UUID          NOT NULL REFERENCES workspaces(id) ON DELETE CASCADE,
+    user_id      UUID          NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    role         workspace_role NOT NULL DEFAULT 'member',
+    display_name TEXT,
+    avatar_url   TEXT,
+    joined_at    TIMESTAMPTZ   NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (workspace_id, user_id)
+);
+
+CREATE TABLE workspace_invitations (
+    id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    workspace_id UUID NOT NULL REFERENCES workspaces(id) ON DELETE CASCADE,
+    created_by   UUID NOT NULL REFERENCES users(id),
+    token        TEXT NOT NULL UNIQUE,
+    max_uses     INT,
+    use_count    INT NOT NULL DEFAULT 0,
+    expires_at   TIMESTAMPTZ,
+    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX workspace_members_user_id_idx ON workspace_members(user_id);