docs(requirements): restore approved REQ bytes and add REQ-001 traceability artifacts

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

docs/requirements/req-001_test-evidence.md

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+# REQ-001 Test Evidence
+
+## Evidence Batch: local API regression run
+
+Requirement revision: `REQ-001@1.0`  
+Commit: `a36b451a3d3180cdd5c7484147a73be749d749a3`  
+Environment: `local sandbox / pytest / fake repository`  
+Executed at: `2026-09-09T11:57:41Z`  
+Run selector: `pytest -q -o addopts='' tests/test_v1_portfolios_manual_ledger.py`  
+Run result: `26 passed`
+
+Test ID: TC-REQ-001-001  
+Result: PASS
+
+Test ID: TC-REQ-001-002  
+Result: PASS
+
+Test ID: TC-REQ-001-005  
+Result: PASS
+
+Test ID: TC-REQ-001-006  
+Result: PASS
+
+Test ID: TC-REQ-001-007  
+Result: PASS
+
+Test ID: TC-REQ-001-009  
+Result: PASS
+
+Test ID: TC-REQ-001-011  
+Result: PASS
+
+Test ID: TC-REQ-001-012  
+Result: PASS
+
+## Evidence Batch: real PostgreSQL concurrency regression
+
+Requirement revision: `REQ-001@1.0`  
+Commit: `a36b451a3d3180cdd5c7484147a73be749d749a3`  
+Environment: `disposable PostgreSQL / independent re-review run`  
+Executed at: `2026-09-09T11:57:41Z`  
+Run selector: `tests/test_bat025_portfolio_ledger_manual_metadata_migration.py::test_cold_repositories_concurrent_dividend_requests_follow_duplicate_contract`  
+Run result: `1 passed` (5회 반복 모두 `성공 1 + 중복 거부 1`, ledger 1건, `profit_buffer=1`)
+
+Test ID: TC-REQ-001-008  
+Result: PASS
+
+## Evidence Batch: PostgreSQL-dependent cases in local sandbox
+
+Requirement revision: `REQ-001@1.0`  
+Commit: `a36b451a3d3180cdd5c7484147a73be749d749a3`  
+Environment: `local sandbox / PostgreSQL DSN 미설정`  
+Executed at: `2026-09-09T11:57:41Z`  
+Run selector: `pytest -q -o addopts='' tests/test_bat025_portfolio_ledger_manual_metadata_migration.py`  
+Run result: `9 skipped`
+
+Test ID: TC-REQ-001-003  
+Result: BLOCKED
+
+Test ID: TC-REQ-001-004  
+Result: BLOCKED
+
+Test ID: TC-REQ-001-010  
+Result: BLOCKED