feat: initialize ERP base platform (extracted from HMS)

- Stripped 11 business crates (health, ai, dialysis, plugins)
- Cleaned AppState, AppConfig, main.rs from business coupling
- Reduced migrations from 169 to 53 (base-only)
- Removed health_provider trait from erp-core
- Removed business integration tests
- Removed gateway rate limiting middleware
- Base capabilities: auth, RBAC, JWT, config, workflow, message, plugin, audit, crypto, RLS, multi-tenant

Cargo check: OK
Cargo test: OK

integration-tests/lib.rs

@@ -0,0 +1,32 @@
+#![allow(unused)]
+#![allow(dead_code)]
+
+mod test_auth_module;
+mod test_config_module;
+mod test_message_module;
+mod test_plugin_module;
+mod test_report;
+mod test_workflow_module;
+mod test_common;
+
+use test_report::{TestReport, TestSuite, TestCase};
+
+pub use test_auth_module::run_auth_tests;
+pub use test_config_module::run_config_tests;
+pub use test_message_module::run_message_tests;
+pub use test_plugin_module::run_plugin_tests;
+pub use test_workflow_module::run_workflow_tests;
+
+pub fn run_all_tests() -> TestReport {
+    let mut report = TestReport::new("ERP Platform Full Integration Test Report".to_string());
+    let start = std::time::Instant::now();
+
+    report.add_suite(run_auth_tests());
+    report.add_suite(run_config_tests());
+    report.add_suite(run_message_tests());
+    report.add_suite(run_workflow_tests());
+    report.add_suite(run_plugin_tests());
+
+    report.elapsed_ms = start.elapsed().as_millis() as u64;
+    report
+}