Added tests which guard the JSON of providers, the runtime, and services before source generation

app/Tests/Serialization/Fixtures/anthropic-messages-request.json

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+{"model":"messages-model","messages":[{"content":"What is the weather?","role":"user"},{"content":[{"type":"text","text":"Compare these pictures."},{"type":"image","source":{"type":"base64","media_type":"image/png","data":"iVBORw0KGgo="}},{"type":"image","source":{"type":"url","url":"https://example.org/picture.png"}}],"role":"user"},{"content":[{"type":"text","text":"Let me search."},{"type":"tool_use","id":"toolu_1","name":"web_search","input":{"query":"weather"}}],"role":"assistant"},{"content":[{"type":"tool_result","tool_use_id":"toolu_1","content":"It is sunny.","is_error":true}],"role":"user"}],"max_tokens":1024,"stream":true,"system":"You answer briefly.","tools":[{"name":"web_search","description":"Search the web.","strict":true,"input_schema":{"type":"object","properties":{"query":{"type":"string","description":"The search query."},"page":{"type":"integer","description":"The page, starting at 1."}},"required":["query"],"additionalProperties":false}}],"temperature":0.5,"top_k":40,"seed":12345678901,"stop":["END",7],"reasoning":{"effort":"low","summary":""},"logprobs":false}

app/Tests/Serialization/Fixtures/chat-completion-request.json

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+{"model":"chat-model","messages":[{"content":"You answer briefly.","role":"system"},{"content":[{"type":"text","text":"What do the pictures show?"},{"type":"image_url","image_url":{"url":"data:image/png;base64,iVBORw0KGgo="}},{"type":"image_url","image_url":"https://example.org/picture.png"}],"role":"user"},{"role":"assistant","content":null,"reasoning_content":"The weather needs a search.","tool_calls":[{"id":"call_1","type":"function","function":{"name":"web_search","arguments":"{\u0022query\u0022:\u0022weather\u0022}"},"index":0}]},{"role":"tool","content":"It is sunny.","tool_call_id":"call_1"}],"stream":true,"tools":[{"type":"function","function":{"name":"web_search","description":"Search the web.","parameters":{"type":"object","properties":{"query":{"type":"string","description":"The search query."},"page":{"type":["integer","null"],"description":"The page, starting at 1."}},"required":["query","page"],"additionalProperties":false},"strict":true}}],"parallel_tool_calls":false,"stream_options":{"include_usage":true},"temperature":0.5,"top_k":40,"seed":12345678901,"stop":["END",7],"reasoning":{"effort":"low","summary":""},"logprobs":false}

app/Tests/Serialization/Fixtures/responses-request.json

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+{"model":"responses-model","input":[{"content":"You answer briefly.","role":"developer"},{"content":[{"type":"input_text","text":"What does the picture show?"},{"type":"input_image","image_url":"data:image/png;base64,iVBORw0KGgo="}],"role":"user"},{"type":"function_call","id":"fc_1","call_id":"call_1","name":"web_search","arguments":"{\u0022query\u0022:\u0022weather\u0022}"},{"type":"function_call_output","call_id":"call_1","output":"It is sunny."}],"stream":true,"store":false,"tools":[{"type":"function","name":"web_search","description":"Search the web.","parameters":{"type":"object","properties":{"query":{"type":"string","description":"The search query."},"page":{"type":["integer","null"],"description":"The page, starting at 1."}},"required":["query","page"],"additionalProperties":false},"strict":true}],"temperature":0.5,"top_k":40,"seed":12345678901,"stop":["END",7],"reasoning":{"effort":"low","summary":""},"logprobs":false}