normalizeBedrockCatalog throws TypeError on non-array summaries or non-string model fields

[hsusul]

Describe the bug

In src/helpers/bedrockCatalog.js:

1. profileIdByModelId(inferenceProfileSummaries) and normalizeBedrockCatalog(modelSummaries, inferenceProfileSummaries) iterate directly over inferenceProfileSummaries || [] and modelSummaries || []. When passed non-array objects or primitives, it throws TypeError: (intermediate value) is not iterable.
2. When sorting models via models.sort((a, b) => a.vendor.localeCompare(b.vendor) || a.label.localeCompare(b.label)), if a model summary contains non-string providerName, modelName, or modelId, calling .localeCompare() throws TypeError: a.vendor.localeCompare is not a function.

To Reproduce

1. Call normalizeBedrockCatalog({}, {}) -> throws TypeError.
2. Call normalizeBedrockCatalog(null, undefined) with non-string fields -> throws TypeError.

Expected Behavior

• normalizeBedrockCatalog and profileIdByModelId should safely accept non-array inputs, defaulting to empty arrays.
• vendor and label should safely be coerced to strings to ensure deterministic sorting without throwing.

[Chadpiha]

Closing together with #1796 — full reasoning over there. Thanks for the report, @hsusul!