feat(w5): dual Flyway history (V1-V6)

Migrations in db/migration/auth/ with separate flyway_schema_history_auth table:
- V1: users + user_identities (with provider/subject unique constraint)
- V2: memberships (polymorphic org_type/org_id, unique per user+org)
- V3: invitations (64-char token, status lifecycle)
- V4: access_requests (requester → reviewer workflow)
- V5: Microsoft tenant_id partial index on user_identities
- V6: login_events + refresh_tokens + revinfo actor_user_id column

PlateAuthFlywayConfig runs a second Flyway bean against flyway_schema_history_auth,
independent of consumer's own flyway_schema_history. Runs at bean init (before JPA).

plate-auth-starter/src/main/java/de/platesoft/auth/config/PlateAuthFlywayConfig.java

@@ -0,0 +1,28 @@
+package de.platesoft.auth.config;
+
+import org.flywaydb.core.Flyway;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.sql.DataSource;
+
+/**
+ * Configures a separate Flyway instance for plate-auth migrations.
+ * Uses its own history table (flyway_schema_history_auth) to avoid
+ * version collisions with the consumer application's migrations.
+ */
+@Configuration
+@ConditionalOnClass(Flyway.class)
+public class PlateAuthFlywayConfig {
+
+    @Bean(initMethod = "migrate")
+    public Flyway plateAuthFlyway(DataSource dataSource) {
+        return Flyway.configure()
+                .dataSource(dataSource)
+                .locations("classpath:db/migration/auth")
+                .table("flyway_schema_history_auth")
+                .baselineOnMigrate(true)
+                .load();
+    }
+}

plate-auth-starter/src/main/resources/db/migration/auth/V1__create_users_and_identities.sql

@@ -0,0 +1,32 @@
+-- V1: Create users and user_identities tables
+CREATE TABLE IF NOT EXISTS users (
+    id UUID PRIMARY KEY,
+    email VARCHAR(255) NOT NULL UNIQUE,
+    password_hash VARCHAR(255),
+    first_name VARCHAR(100) NOT NULL,
+    last_name VARCHAR(100) NOT NULL,
+    role VARCHAR(50) NOT NULL DEFAULT 'ROLE_USER',
+    active BOOLEAN NOT NULL DEFAULT TRUE,
+    default_org_id UUID,
+    last_provider VARCHAR(32),
+    version BIGINT DEFAULT 0,
+    last_login TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS user_identities (
+    id UUID PRIMARY KEY,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    provider VARCHAR(32) NOT NULL,
+    subject VARCHAR(255) NOT NULL,
+    email VARCHAR(255) NOT NULL,
+    tenant_id VARCHAR(64),
+    linked_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    last_login_at TIMESTAMPTZ,
+    version BIGINT DEFAULT 0,
+    CONSTRAINT uq_user_identities_provider_subject UNIQUE (provider, subject)
+);
+
+CREATE INDEX idx_user_identities_user_id ON user_identities(user_id);
+CREATE INDEX idx_users_email ON users(email);

plate-auth-starter/src/main/resources/db/migration/auth/V2__create_memberships.sql

@@ -0,0 +1,20 @@
+-- V2: Create memberships table
+CREATE TABLE IF NOT EXISTS memberships (
+    id UUID PRIMARY KEY,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    org_type VARCHAR(16) NOT NULL,
+    org_id UUID NOT NULL,
+    role VARCHAR(16) NOT NULL DEFAULT 'MEMBER',
+    status VARCHAR(16) NOT NULL DEFAULT 'ACTIVE',
+    granted_by UUID,
+    grant_reason VARCHAR(64),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    revoked_at TIMESTAMPTZ,
+    revoked_by UUID,
+    version BIGINT DEFAULT 0,
+    CONSTRAINT uq_memberships_user_org UNIQUE (user_id, org_type, org_id)
+);
+
+CREATE INDEX idx_memberships_user_id ON memberships(user_id);
+CREATE INDEX idx_memberships_org ON memberships(org_type, org_id);
+CREATE INDEX idx_memberships_status ON memberships(status);

plate-auth-starter/src/main/resources/db/migration/auth/V3__create_invitations.sql

@@ -0,0 +1,23 @@
+-- V3: Create invitations table
+CREATE TABLE IF NOT EXISTS invitations (
+    id UUID PRIMARY KEY,
+    token VARCHAR(64) NOT NULL UNIQUE,
+    email VARCHAR(255) NOT NULL,
+    org_type VARCHAR(16) NOT NULL,
+    org_id UUID NOT NULL,
+    role VARCHAR(16) NOT NULL DEFAULT 'MEMBER',
+    status VARCHAR(16) NOT NULL DEFAULT 'PENDING',
+    created_by UUID NOT NULL REFERENCES users(id),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    expires_at TIMESTAMPTZ NOT NULL,
+    accepted_at TIMESTAMPTZ,
+    accepted_by UUID,
+    revoked_at TIMESTAMPTZ,
+    revoked_by UUID,
+    note VARCHAR(500),
+    version BIGINT DEFAULT 0
+);
+
+CREATE INDEX idx_invitations_email ON invitations(email);
+CREATE INDEX idx_invitations_token ON invitations(token);
+CREATE INDEX idx_invitations_org ON invitations(org_type, org_id);

plate-auth-starter/src/main/resources/db/migration/auth/V4__create_access_requests.sql

@@ -0,0 +1,19 @@
+-- V4: Create access_requests table
+CREATE TABLE IF NOT EXISTS access_requests (
+    id UUID PRIMARY KEY,
+    requester_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    org_type VARCHAR(16) NOT NULL,
+    org_id UUID NOT NULL,
+    requested_role VARCHAR(16) NOT NULL DEFAULT 'VIEWER',
+    justification VARCHAR(500),
+    status VARCHAR(16) NOT NULL DEFAULT 'PENDING',
+    reviewer_id UUID,
+    decision_reason VARCHAR(500),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    decided_at TIMESTAMPTZ,
+    version BIGINT DEFAULT 0
+);
+
+CREATE INDEX idx_access_requests_requester ON access_requests(requester_id);
+CREATE INDEX idx_access_requests_org ON access_requests(org_type, org_id);
+CREATE INDEX idx_access_requests_status ON access_requests(status);

plate-auth-starter/src/main/resources/db/migration/auth/V5__add_microsoft_tenant_id_index.sql

@@ -0,0 +1,3 @@
+-- V5: Add index on user_identities.tenant_id for Microsoft Entra lookups
+CREATE INDEX IF NOT EXISTS idx_user_identities_microsoft_tenant_id
+    ON user_identities(tenant_id) WHERE tenant_id IS NOT NULL;

plate-auth-starter/src/main/resources/db/migration/auth/V6__create_login_events_and_revinfo_actor.sql

@@ -0,0 +1,43 @@
+-- V6: Create login_events table and revinfo actor column
+CREATE TABLE IF NOT EXISTS login_events (
+    id BIGSERIAL PRIMARY KEY,
+    user_id UUID,
+    email VARCHAR(255) NOT NULL,
+    provider VARCHAR(32) NOT NULL,
+    outcome VARCHAR(32) NOT NULL,
+    ip_address VARCHAR(45),
+    user_agent VARCHAR(512),
+    correlation_id VARCHAR(64),
+    occurred_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_login_events_user_id ON login_events(user_id);
+CREATE INDEX idx_login_events_email ON login_events(email);
+CREATE INDEX idx_login_events_occurred_at ON login_events(occurred_at);
+
+-- Create refresh_tokens table
+CREATE TABLE IF NOT EXISTS refresh_tokens (
+    id UUID PRIMARY KEY,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    token VARCHAR(255) NOT NULL UNIQUE,
+    expires_at TIMESTAMPTZ NOT NULL,
+    revoked BOOLEAN NOT NULL DEFAULT FALSE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_refresh_tokens_user_id ON refresh_tokens(user_id);
+CREATE INDEX idx_refresh_tokens_token ON refresh_tokens(token);
+
+-- Envers revinfo actor tracking (add actor_user_id if revinfo table exists)
+-- This is safe to run regardless of whether Envers has created its tables yet,
+-- because Hibernate Envers will create revinfo on first boot.
+-- Consumer's Flyway or plate-auth's FlywayConfig runs before JPA init.
+DO $$
+BEGIN
+    IF EXISTS (SELECT FROM pg_tables WHERE tablename = 'revinfo') THEN
+        IF NOT EXISTS (SELECT FROM information_schema.columns
+                       WHERE table_name = 'revinfo' AND column_name = 'actor_user_id') THEN
+            ALTER TABLE revinfo ADD COLUMN actor_user_id UUID;
+        END IF;
+    END IF;
+END $$;