Update team lead constraints

src/main/resources/db/changelog/changes/20240429_01_wayne/01_team_lead_constraints.sql

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+-- liquibase formatted sql
+-- changeset wayne:team_lead_constraints
+
+ALTER TABLE team ADD CONSTRAINT uc_team_teamlead UNIQUE (teamLead);
+ALTER TABLE team ADD CONSTRAINT FK_TEAM_ON_TEAMLEAD FOREIGN KEY (teamLead) REFERENCES staff (id);

src/main/resources/db/changelog/changes/20240429_01_wayne/02_mock_team_lead.sql

@@ -0,0 +1,5 @@
+-- liquibase formatted sql
+-- changeset wayne:mock_team_lead
+
+UPDATE team SET teamLead = 1 WHERE id = 1;
+UPDATE team SET teamLead = 2 WHERE id = 2;