fix(ai-openrouter): generate OPENROUTER_COMBINED_TOOLS_AND_SCHEMA_MODELS from the catalog

The model sync (#1158) dropped the hand-maintained set. Instead of restoring
it by hand, derive it in convert-openrouter-models.ts from each chat model's
supported_parameters (structured_outputs + tools + tool_choice), so every
sync regenerates it and nothing is curated.

Closes #1163

Author: tombeckenham

.changeset/openrouter-combined-models-restore.md

@@ -2,4 +2,4 @@
 '@tanstack/ai-openrouter': patch
 ---
 
-Restore `OPENROUTER_COMBINED_TOOLS_AND_SCHEMA_MODELS`, which the model-metadata sync dropped from the generated `model-meta.ts`. The list now lives in its own hand-maintained module and the generator re-exports it, so future syncs can't remove it.
+Restore `OPENROUTER_COMBINED_TOOLS_AND_SCHEMA_MODELS`, which the model-metadata sync dropped from the generated `model-meta.ts`. The set is now generated from OpenRouter's catalog (chat models whose `supported_parameters` include `structured_outputs`, `tools` and `tool_choice`) instead of being hand-maintained, so combined tools + `outputSchema` mode now covers every model OpenRouter flags as supporting it.

docs/adapters/openrouter.md

@@ -119,15 +119,12 @@ upstream models OpenRouter can return the typed object in that same streaming
 request, so the engine does not make a second finalization call.
 
 That happens only when **every** model that can receive the request is in
-`OPENROUTER_COMBINED_TOOLS_AND_SCHEMA_MODELS`. The set is the upstream models
-that already support this combined mode:
-
-- Anthropic Claude 4.5 and later
-- Gemini 3.x text models
-- Grok 4.x (not the multi-agent variant)
-- OpenAI models from the `gpt-4o-2024-08-06` strict JSON Schema era onward
-  (the unpinned `openai/gpt-4o-mini` alias is included; the dated pin
-  `openai/gpt-4o-mini-2024-07-18` is not)
+`OPENROUTER_COMBINED_TOOLS_AND_SCHEMA_MODELS`. The set is generated from
+OpenRouter's catalog on every model sync: every chat model whose
+`supported_parameters` include `structured_outputs`, `tools` and `tool_choice`
+(Claude 4.5+, Gemini 2.5+, GPT-4o+, Grok 4, DeepSeek V3+, Llama 3.1+, and so
+on). Models OpenRouter does not flag, such as `anthropic/claude-opus-4.1`, stay
+on the legacy two-call path.
 
 If any fallback in `modelOptions.models` is outside that set, OpenRouter keeps
 the two-call path. Routing suffixes such as `:nitro` do not change the gate.

docs/config.json

@@ -884,7 +884,7 @@
           "label": "OpenRouter Adapter",
           "to": "adapters/openrouter",
           "addedAt": "2026-04-15",
-          "updatedAt": "2026-08-19"
+          "updatedAt": "2026-08-20"
         },
         {
           "label": "Perplexity Search",