Registers claude-opus-5 across the cost maps and provider lists so the model
prices, reports its real 1M/128K limits, and advertises its capabilities instead
of falling through the generalization patterns at zero cost.
Adds the first-party entry plus the Bedrock (base, global, us, eu, au, jp),
Vertex AI, and Azure AI variants. Pricing matches Opus 4.8 at $5/$25 per MTok
with the usual 1.1x regional premium on the cross-region inference profiles, and
fast mode is priced at 2x through provider_specific_entry on the first-party
entry only.
Two fields deliberately differ from Opus 4.8: prompt_cache_min_tokens drops to
512, and bedrock_output_config_effort_ceiling is omitted because Bedrock accepts
output_config.effort="max" for Opus 5.
