feat(customers): enhance customer retrieval with filtering options

- Updated `findAll` method in `CustomersController` to accept filtering parameters.
- Implemented filtering logic in `CustomersService` to retrieve customers based on type and search query.
- Added `PosCustomerFilterDto` for query validation.
- Updated customer-related DTOs to make fields optional and added length validation where necessary.
- Modified customer-related logic in `sales-invoice-tsp.utils.ts` to accommodate new DTO structure.
- Added unique constraints to `customer_individuals` and `customer_legal` tables in the database migration.
- Removed commented-out code in `PosMiddleware` for cleaner codebase.
- Set default value for `is_default_guild_good` to false in `OwnedGoodsService`.

Agents.md

@@ -128,3 +128,55 @@ Typecheck before handoff:
 ```bash
 pnpm -s tsc --noEmit
 ```
+
+# INVESTIGATION LIMITS
+
+For localized fixes:
+
+- maximum 3 file reads before first edit
+- maximum 1 related-file read unless required
+- maximum 5 total file reads before implementation
+
+Stop searching once the target service, controller, DTO, schema, or repository method is identified.
+
+# TARGETED READ RULES
+
+Do not read files larger than 300 lines unless required.
+
+For known symbols:
+
+1. rtk grep
+2. rtk smart
+3. read only the relevant section
+
+Avoid opening entire services, modules, or controllers for localized changes.
+
+Prefer symbol-level inspection.
+
+# REVIEW MODE
+
+During reviews:
+
+- inspect changed files only
+- avoid repository-wide searches
+- avoid architecture exploration
+- avoid reading unrelated modules
+
+Review only code affected by the diff.
+
+# HARD TOKEN LIMITS
+
+For localized fixes:
+
+- Never read more than 5 files before the first edit.
+- Never read a file larger than 300 lines unless the target symbol cannot be isolated.
+- Never open an entire service, controller, or module when a symbol-level read is possible.
+- Never reread a file already summarized by `rtk smart` unless implementation details are required.
+
+When a file exceeds 300 lines:
+
+1. rtk grep
+2. rtk smart
+3. read only the required section
+
+Avoid full-file reads.