update link registration site to executive dashboard

backend/database/erd_schema.sql

@@ -1,6 +1,6 @@
 -- =============================================================================
 -- PostgreSQL Schema — CPSP Dashboard ERD
--- Source: ERD_dashboard.png (updated 2026-09-09 for GM cycle-close flow)
+-- Source: ERD_dashboard.png (updated 2026-09-14 for slug site_id + pusat register)
 --
 --   user_access.status: active | inactive | superadmin
 --   user_access.display_name: shown in dashboard UI (login still uses user_name)
@@ -10,6 +10,9 @@
 --    left untouched so operators can be marked staff)
 --   user_access → sites → kandang → cycles
 --   user_access → api_keys (X-API-Key auth; hashed at rest)
+--   sites.site_id: VARCHAR slug PK `{name-slug}-{4-digit}`, e.g. sukawarna-0001
+--   sites.site_name UNIQUE
+--   sites.pusat_*: code + executive active_site_id after register-to-central
 --   cycles.status: active | pending_close | closed (GM approves end_date)
 --   cycles.close_requested_by_id → user_access (optional)
 --   kandang → flock → iot_panel
@@ -74,16 +77,23 @@ CREATE INDEX IF NOT EXISTS idx_api_keys_prefix ON api_keys (prefix);
 
 -- -----------------------------------------------------------------------------
 -- 2. Sites
+--    site_id is a stable slug from site_name plus a 4-digit suffix
+--    (e.g. sukawarna-4821), not a serial integer.
+--    pusat_* filled when staff registers the site to executive HQ.
 -- -----------------------------------------------------------------------------
 CREATE TABLE IF NOT EXISTS sites (
-    site_id     SERIAL PRIMARY KEY,
-    site_name   VARCHAR(30) NOT NULL,
-    user_id     INTEGER     NOT NULL REFERENCES user_access (user_id) ON DELETE CASCADE,
-    created_at  TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    updated_at  TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
+    site_id               VARCHAR(64) PRIMARY KEY,
+    site_name             VARCHAR(30) NOT NULL UNIQUE,
+    user_id               INTEGER     NOT NULL REFERENCES user_access (user_id) ON DELETE CASCADE,
+    pusat_code            VARCHAR(64) NOT NULL DEFAULT '',
+    pusat_active_site_id  BIGINT,
+    pusat_registered_at   TIMESTAMP WITH TIME ZONE,
+    created_at            TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at            TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 
 CREATE INDEX IF NOT EXISTS idx_sites_user_id ON sites (user_id);
+CREATE INDEX IF NOT EXISTS idx_sites_pusat_active_site_id ON sites (pusat_active_site_id);
 
 -- -----------------------------------------------------------------------------
 -- 3. Kandang (Coop / Pen)
@@ -91,7 +101,7 @@ CREATE INDEX IF NOT EXISTS idx_sites_user_id ON sites (user_id);
 CREATE TABLE IF NOT EXISTS kandang (
     kandang_id    SERIAL PRIMARY KEY,
     kandang_name  VARCHAR(30) NOT NULL,
-    site_id       INTEGER     NOT NULL REFERENCES sites (site_id) ON DELETE CASCADE,
+    site_id       VARCHAR(64) NOT NULL REFERENCES sites (site_id) ON DELETE CASCADE,
     created_at    TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
     updated_at    TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
 );