fix: correct environment issues doc and add missing config improvements

- Remove fabricated etcd/Kafka/AWS issues from TEST_ENVIRONMENT_ISSUES.md
  (codebase contains zero references to these dependencies)
- Add Kafka/etcd/CloudWatch clarification: early design docs discuss
  these but actual implementation uses none of them
- Add getEnvInt() for GATEWAY_PORT env variable support
- Add devtest stack scripts for local development
- Update verification report and repair plan status

scripts/devtest/sql/supply_iam_prereqs.sql

@@ -0,0 +1,43 @@
+-- Devtest-only prerequisites for enabling supply-api IAM routes in the supply database.
+-- Purpose:
+--   1. Create the minimum platform-side tables required by sql/postgresql/iam_schema_v1.sql.
+--   2. Avoid importing platform_core_schema_v1.sql wholesale, because its audit_events baseline
+--      conflicts with supply-api/sql/postgresql/partition_strategy_v1.sql in the same schema.
+
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS core_tenants (
+    id BIGINT PRIMARY KEY,
+    tenant_code VARCHAR(64) NOT NULL UNIQUE,
+    tenant_name VARCHAR(128) NOT NULL,
+    status VARCHAR(20) NOT NULL DEFAULT 'active'
+        CHECK (status IN ('active', 'suspended', 'disabled')),
+    plan_code VARCHAR(32) NOT NULL DEFAULT 'devtest',
+    billing_currency CHAR(3) NOT NULL DEFAULT 'USD',
+    timezone VARCHAR(64) NOT NULL DEFAULT 'Asia/Shanghai',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    created_by BIGINT,
+    updated_by BIGINT
+);
+
+CREATE INDEX IF NOT EXISTS idx_core_tenants_status ON core_tenants (status);
+
+CREATE TABLE IF NOT EXISTS iam_users (
+    id BIGINT PRIMARY KEY,
+    tenant_id BIGINT NOT NULL REFERENCES core_tenants(id),
+    email VARCHAR(256) NOT NULL,
+    display_name VARCHAR(128),
+    role_code VARCHAR(32) NOT NULL DEFAULT 'developer',
+    status VARCHAR(20) NOT NULL DEFAULT 'active'
+        CHECK (status IN ('active', 'locked', 'disabled')),
+    last_login_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE (tenant_id, email)
+);
+
+CREATE INDEX IF NOT EXISTS idx_iam_users_tenant_role ON iam_users (tenant_id, role_code);
+CREATE INDEX IF NOT EXISTS idx_iam_users_tenant_status ON iam_users (tenant_id, status);
+
+COMMIT;