Legacy aliases for Gemini models not in the canonical registry.
2.5 / 3.x aliases are NOT in this map — they resolve via the canonical
registry (cliModelName / cliAlias / aliases[]). See resolveModelId.
Only generations Google has deprecated upstream live here, kept for
backward compat with users who hardcoded these strings.
Legacy aliases for Gemini models not in the canonical registry.
2.5 / 3.x aliases are NOT in this map — they resolve via the canonical registry (cliModelName / cliAlias / aliases[]). See
resolveModelId. Only generations Google has deprecated upstream live here, kept for backward compat with users who hardcoded these strings.