feat(phase-0,phase-2): bootstrap DB schemas + Metabase/NocoDB compose + work_types seed

sql/migrations/002_core_employee.sql

@@ -0,0 +1,48 @@
+-- 002_core_employee.sql — core.office, core.department, core.employee, history
+
+CREATE TABLE core.office (
+    id bigserial PRIMARY KEY,
+    name text NOT NULL,
+    bitra_id text UNIQUE
+);
+
+CREATE TABLE core.department (
+    id bigserial PRIMARY KEY,
+    name text NOT NULL,
+    bitra_id text UNIQUE,
+    bitrix_id bigint UNIQUE,
+    parent_id bigint REFERENCES core.department,
+    source text NOT NULL DEFAULT 'bitra'   -- bitra | bitrix
+);
+
+CREATE TABLE core.employee (
+    id bigserial PRIMARY KEY,
+    email text UNIQUE NOT NULL,
+    full_name text,
+    first_name text,
+    last_name text,
+    bitra_user_id text UNIQUE,
+    eva_person_id text UNIQUE,
+    bitrix_user_id bigint UNIQUE,
+    rate decimal(10,2),
+    office_id bigint REFERENCES core.office,
+    department_id bigint REFERENCES core.department,
+    is_active boolean DEFAULT true,
+    is_target_for_mvp1 boolean DEFAULT false,
+    last_synced timestamptz
+);
+
+CREATE INDEX idx_employee_email ON core.employee (lower(email));
+CREATE INDEX idx_employee_bitra_id ON core.employee (bitra_user_id);
+CREATE INDEX idx_employee_eva_id ON core.employee (eva_person_id);
+CREATE INDEX idx_employee_bitrix_id ON core.employee (bitrix_user_id);
+CREATE INDEX idx_employee_target_mvp1 ON core.employee (is_target_for_mvp1) WHERE is_target_for_mvp1 = true;
+
+CREATE TABLE core.department_history (
+    employee_id bigint REFERENCES core.employee,
+    valid_from date NOT NULL,
+    valid_to date,
+    department_id bigint REFERENCES core.department,
+    source text NOT NULL DEFAULT 'bitra',
+    PRIMARY KEY (employee_id, valid_from)
+);