fix: ignore malformed/empty filter entries that carry no nested filters

[radu-2026]

Handle requests which carry filters with no nested filters.

Err:

error: 2026-07-13T16:09:44.265Z: Error caught while processing read request: Cannot read properties of undefined (reading 'map') [{"message":"Cannot read properties of undefined (reading 'map')","stack":"TypeError: Cannot read properties of undefined (reading 'map')\n    at /home/node/resource-srv/node_modules/@restorecommerce/resource-base-interface/src/index.ts:173:34\n    at Array.map (<anonymous>)\n    at toObject (/home/node/resource-srv/node_modules/@restorecommerce/resource-base-interface/src/index.ts:171:49)\n    at gQe.read (/home/node/resource-srv/node_modules/@restorecommerce/resource-base-interface/src/core/ServiceBase.ts:127:48)\n    at gQe.read (/home/node/resource-srv/node_modules/@restorecommerce/resource-srv/src/service.ts:98:26)\n    at processTicksAndRejections (node:internal/process/task_queues:104:5)\n    at Object.unaryMethodHandler [as next] (/home/node/resource-srv/node_modules/nice-grpc/src/server/handleUnaryCall.ts:34:12)\n    at /home/node/resource-srv/node_modules/@restorecommerce/chassis-srv/src/microservice/transport/provider/grpc/middlewares.ts:36:24\n    at metaMiddleware (/home/node/resource-srv/node_modules/@restorecommerce/chassis-srv/src/microservice/transport/provider/grpc/middlewares.ts:99:10)\n    at tracingMiddleware (/home/node/resource-srv/node_modules/@restorecommerce/chassis-srv/src/microservice/transport/provider/grpc/middlewares.ts:20:10)","name":"TypeError"}]

[coveralls]

Coverage Report for CI Build 29314852691

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Coverage: 68.398%

Details

• Patch coverage: 6 of 6 lines across 1 file are fully covered (100%).

Uncovered Changes

No uncovered changes found.

Coverage Regressions

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Coverage Stats

Relevant Lines:	545
Covered Lines:	414
Line Coverage:	75.96%
Relevant Branches:	379
Covered Branches:	218
Branch Coverage:	57.52%
Branches in Coverage %:	Yes
Coverage Strength:	51.42 hits per line

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