fix(db): V37 crashed boot — company was redefined via CREATE IF NOT EXISTS (no-op) then indexed on missing column

V2 already has `company` (id PK, name/registration_no/phone). V37's CREATE TABLE IF NOT EXISTS
company was a no-op, so the follow-up `CREATE INDEX ON company (tenant_id, company_name)` hit
"column tenant_id does not exist", failing Flyway and rolling the deploy back to the old jar
(V36). Fix: expand the existing V2 company via idempotent ALTER ADD COLUMN + backfill
(name->company_name, registration_no->biz_no, phone->contact_tel). V38 re-backfills new rows.
Verified by BEGIN...ROLLBACK dry-run of V37+V38 against the live schema (0 errors).

Local unit tests don't execute Flyway, so this class of error only surfaces at boot — same
lesson as V17/V19. Dry-run against real schema before deploy for migrations touching legacy tables.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/backend/src/main/resources/db/migration/V37__system_basics.sql

@@ -21,22 +21,24 @@ CREATE TABLE IF NOT EXISTS dept (
 );
 CREATE INDEX IF NOT EXISTS idx_dept_parent ON dept (tenant_id, parent_id, sort_order);
 
-CREATE TABLE IF NOT EXISTS company (
+-- ★company 는 V2 에 이미 존재하는 마스터(공사/등록업체) — 재정의(CREATE)하면 no-op 라 신규 컬럼이 안 생겨
-    tenant_id     varchar(40)  NOT NULL DEFAULT 'KINTEX',
+--   후행 인덱스가 없는 컬럼을 참조해 실패한다(2026-07-12 배포 크래시). 기존 테이블을 멱등 ALTER 로 확장한다.
-    id            varchar(40)  NOT NULL,
+--   PK(id)·기존 컬럼(name·registration_no·phone·registered·category)은 불변 — auction 등 FK 참조 보존.
-    company_name  varchar(200) NOT NULL,
+ALTER TABLE company ADD COLUMN IF NOT EXISTS tenant_id    varchar(40)  NOT NULL DEFAULT 'KINTEX';
-    biz_no        varchar(40),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS company_name varchar(200);
-    ceo_name      varchar(120),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS biz_no       varchar(40);
-    biz_type      varchar(120),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS ceo_name     varchar(120);
-    contact_name  varchar(120),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS biz_type     varchar(120);
-    contact_tel   varchar(60),                       -- 저장은 원문, 응답은 마스킹(코드 계층)
+ALTER TABLE company ADD COLUMN IF NOT EXISTS contact_name varchar(120);
-    address       varchar(400),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS contact_tel  varchar(60);   -- 저장 원문, 응답 마스킹(코드 계층)
-    partner_type  varchar(40),                        -- 공통코드(PARTNER_TYPE) 값
+ALTER TABLE company ADD COLUMN IF NOT EXISTS address      varchar(400);
-    use_yn        char(1)      NOT NULL DEFAULT 'Y',
+ALTER TABLE company ADD COLUMN IF NOT EXISTS partner_type varchar(40);   -- 공통코드(PARTNER_TYPE)
-    created_at    timestamptz  NOT NULL DEFAULT now(),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS use_yn       char(1)      NOT NULL DEFAULT 'Y';
-    updated_at    timestamptz  NOT NULL DEFAULT now(),
+ALTER TABLE company ADD COLUMN IF NOT EXISTS updated_at   timestamptz  NOT NULL DEFAULT now();
-    PRIMARY KEY (tenant_id, id)
+-- V2 기존 컬럼 → W12 컬럼 백필(멱등)
-);
+UPDATE company SET company_name = name            WHERE company_name IS NULL AND name IS NOT NULL;
+UPDATE company SET biz_no       = registration_no WHERE biz_no IS NULL AND registration_no IS NOT NULL;
+UPDATE company SET contact_tel  = phone           WHERE contact_tel IS NULL AND phone IS NOT NULL;
 CREATE INDEX IF NOT EXISTS idx_company_name ON company (tenant_id, company_name);
 
 -- ============================================================================

src/backend/src/main/resources/db/migration/V38__demo_seed_full.sql

@@ -544,3 +544,8 @@ ON CONFLICT (id) DO NOTHING;
 --   -- 부스 판매분포: SELECT status,count(*) FROM booth_sale WHERE event_id='e-2026-smf' GROUP BY status;
 --   -- 리드 15/핫4: SELECT count(*), count(*) FILTER(WHERE score>=80) FROM lead WHERE event_id='e-2026-smf';
 -- ============================================================================
+
+-- 신규 company 행 company_name 정합(V37 이 name→company_name 백필하나 본 파일 신규행은 V37 이후 삽입되므로 재백필).
+UPDATE company SET company_name = name    WHERE company_name IS NULL AND name IS NOT NULL;
+UPDATE company SET biz_no       = registration_no WHERE biz_no IS NULL AND registration_no IS NOT NULL;
+UPDATE company SET contact_tel  = phone   WHERE contact_tel IS NULL AND phone IS NOT NULL;