## Description

Several Claude models in `model_prices_and_context_window.json` are missing `eu.` and `us.` regional prefix entries for AWS Bedrock. This causes LiteLLM to report $0 pricing (and break budget enforcement) when these models are used with European or US regional Bedrock endpoints.

Only the two newest models (`claude-opus-4-6-v1`, `claude-sonnet-4-6`) have `eu.`/`us.` entries. All older models are missing them:

| Model | `anthropic.` | `eu.` | `us.` | `apac.` | |---|---|---|---|---| | `claude-opus-4-6-v1` | ✅ | ✅ | ✅ | — | | `claude-sonnet-4-6` | ✅ | ✅ | ✅ | — | | `claude-opus-4-5-20251101-v1:0` | ✅ | ❌ | ❌ | ❌ | | `claude-sonnet-4-5-20250929-v1:0` | ✅ | ❌ | ❌ | `au.` only | | `claude-sonnet-4-20250514-v1:0` | ✅ | ❌ | ❌ | ✅ | | `claude-haiku-4-5-20251001-v1:0` | ✅ | ❌ | ❌ | ✅ |

## Impact

When using e.g. `bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0`, LiteLLM cannot find a matching entry in the cost map, so: - `input_cost_per_token` and `output_cost_per_token` default to `0.0` - `/model_group/info` reports $0 pricing for these models - Per-user and per-key budget enforcement is ineffective (spend is always $0) - The LiteLLM dashboard shows incorrect cost data …