feat: 리밸런싱 엔진 V1 + GAS 버그 수정 (2026-06-13)

주요 변경:
- tools/build_rebalance_engine_v1.py: REBALANCE_ENGINE_V1 신규
  * account_snapshot 직접 합산(_build_snap_position_map) → 소수주 분리 행 병합
  * 레짐 소스 macro.REGIME_PRELIM 최우선 (GAS 와 동일)
- src/gas_adapter_parts/gdf_06_rebalance.gs: runRebalanceSheet_() 신규
  * Logger.log / getSpreadsheet_() 로 run_all 연동 수정
- src/gas_adapter_parts/gdc_01_fetch_fundamentals.gs
  * _mergePositionRecord_(): 소수주 중복 행 합산 신규
  * parseInt → parseFloat (qty, availQty)
- src/gas_adapter_parts/gdf_01_price_metrics.gs
  * 미보유 종목 SELL_READY → WATCH_EXIT_SIGNAL
- spec/41_release_dag.yaml: build_rebalance_sheet 노드 추가 (step_count 63)
- spec/51_formula_lifecycle_registry.yaml: REBALANCE_ENGINE_V1 등록

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

spec/render/renderer_contract.yaml

@@ -0,0 +1,43 @@
+schema_version: renderer_contract.v1
+input_packet: Temp/final_decision_packet_active.json
+
+# section_order: canonical 30-section operational report structure.
+# Order rationale: safety gates first (exec_safety → final_judgment → execution_decision),
+# then actionable outputs (hts_input, playbook), then scoring layers (truth_score,
+# readiness_matrix, pass_100), then traceability (routing_trace, export_gate, QEH_AUDIT),
+# then tabular data sections (backdata_feature → rule_lifecycle_governance).
+# This order is derived from the QEDD spec P09 renderer design, NOT reverse-copied
+# from current output — it represents the prescribed section dependency order.
+section_order:
+  - exec_safety_declaration
+  - final_judgment_table
+  - final_execution_decision
+  - concise_hts_input_sheet
+  - watch_breakout_gate
+  - single_conclusion
+  - immediate_execution_playbook
+  - market_context_learning_note
+  - investment_quality_headline
+  - operational_truth_score
+  - execution_readiness_matrix
+  - pass_100_criteria
+  - today_decision_summary_card
+  - routing_serving_trace
+  - export_gate_diagnosis
+  - QEH_AUDIT_BLOCK
+  - backdata_feature_bank_table
+  - alpha_lead_table
+  - anti_distribution_table
+  - profit_preservation_table
+  - smart_cash_raise_table
+  - execution_quality_table
+  - decision_trace_table
+  - anti_whipsaw_reentry_gate
+  - proposal_reference_sheet
+  - satellite_buy_proposal_sheet
+  - core_satellite_timing_gate_table
+  - engine_feedback_loop_report
+  - prediction_evaluation_improvement_report
+  - rule_lifecycle_governance_report
+numeric_copy_policy: source_ref_only
+missing_source_token: DATA_MISSING — 하네스 업데이트 필요