FIX[BE]: if project flocs deleted kandangs reset to non_active and add filter get all project_flock by area,kandangs,period and location

internal/database/migrations/20251018072532_project_flock_kandangs.up.sql

@@ -0,0 +1,17 @@
+CREATE TABLE project_flock_kandangs (
+    id BIGSERIAL PRIMARY KEY,
+    project_flock_id BIGINT NOT NULL REFERENCES project_flocks (id) ON DELETE CASCADE ON UPDATE CASCADE,
+    kandang_id BIGINT NOT NULL REFERENCES kandangs (id) ON DELETE CASCADE ON UPDATE CASCADE,
+    created_by BIGINT REFERENCES users (id) ON DELETE SET NULL ON UPDATE CASCADE,
+    assigned_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    detached_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_project_flock_kandangs_project ON project_flock_kandangs (project_flock_id);
+CREATE INDEX idx_project_flock_kandangs_kandang ON project_flock_kandangs (kandang_id);
+
+CREATE UNIQUE INDEX idx_project_flock_kandangs_active ON project_flock_kandangs (project_flock_id, kandang_id)
+WHERE
+    detached_at IS NULL;