chore: remove legacy specification documents and internal rules file

docs/staging/MANIFEST.md

@@ -0,0 +1,49 @@
+# Knowledge Pipeline Manifest
+
+> Single source of truth cho toàn bộ pipeline status.
+> Mỗi source file có 1 section riêng với trạng thái từng stage.
+
+---
+
+## Source: FSD_P1
+
+- **File**: FSD P1_Finnal Version.docx
+- **Added**: 2026-07-25
+- **Stages**:
+
+| Stage | Status | Items | Notes |
+|---|---|---|---|
+| prep | ✅ DONE | 1 file | Raw + Clean completed |
+| structure | ✅ DONE | 30 specs (8 campaign, 10 customer, 4 catalogue, 5 marketing, 1 targeting, 1 system) + UI discarded | 6 domains |
+| transform | ✅ DONE | 30 cards (10/10 QC) | All domains |
+| reference | ✅ DONE | 9 refs (P0: 4, P1: 5) | |
+| validate | ✅ DONE | 30 pass, 0 error | |
+
+- **Cards**:
+  - campaign/reward_campaign, campaign/campaign_rule, campaign/special_rule_types, campaign/transaction_codes, campaign/pool_definition, campaign/pool_conversion_rate, campaign/counter_definition, campaign/account_type_group, campaign/cep_request, campaign/rep_rule, campaign/item_redemption_rule
+  - customer/customer_overview, customer/account, customer/card, customer/pool_balance, customer/transaction_history, customer/no_hit_transaction, customer/statement, customer/attribute_counter, customer/operations_adjustment, customer/operations_transaction
+  - catalogue/catalogue_category, catalogue/item_master, catalogue/item_price, catalogue/voucher_code
+  - marketing/marketing_campaign, marketing/marketing_message, marketing/ab_testing, marketing/frequency_capping, marketing/audience_filter
+  - targeting/segmentation
+  - system/application_parameter
+
+- **Refs**: campaign/criteria_operators, campaign/formula_calculation, campaign/expiry_policies, customer/adjustment_deduction_logic, campaign/batch_rule_processing, campaign/velocity_control_detail, catalogue/fulfillment_lifecycle, catalogue/redemption_pricing_detail, marketing/omr_execution_flow
+
+---
+
+## Source: Formula_Pack
+
+- **Files**: Formula.docx, Formula validation.docx
+- **Added**: 2026-07-26
+- **Merged into**: campaign/campaign_rule (incremental update)
+- **Stages**:
+
+| Stage | Status | Items | Notes |
+|---|---|---|---|
+| prep | ✅ DONE | 2 files | Raw + Clean completed |
+| structure | ✅ DONE | Merged into campaign/campaign_rule, campaign/formula_validation | |
+| transform | ✅ DONE | 0 new cards (incremental on campaign/campaign_rule) | |
+| reference | ✅ DONE | Covered by existing refs | |
+| validate | ✅ DONE | Included in FSD_P1 validation | |
+
+- **Cards**: (merged into FSD_P1 cards — no new standalone cards)