feat: add OPENCLAUDE_DISABLE_STRICT_TOOLS env var to opt out of strict MCP tool schema normalization (#770)

When set, disables strict schema normalization for non-Gemini providers.
Useful for OpenAI-compatible endpoints that reject MCP tools with complex
optional params (e.g. list[dict]) with "Extra required key ... supplied"
errors.

src/services/api/openaiShim.ts

@@ -607,7 +607,10 @@ function convertTools(
         function: {
           name: t.name,
           description: t.description ?? '',
-          parameters: normalizeSchemaForOpenAI(schema, !isGemini),
+          parameters: normalizeSchemaForOpenAI(
+            schema,
+            !isGemini && !isEnvTruthy(process.env.OPENCLAUDE_DISABLE_STRICT_TOOLS),
+          ),
         },
       }
     })
@@ -1657,7 +1660,7 @@ class OpenAIShimMessages {
           } catch (error) {
             throwClassifiedTransportError(error, responsesUrl)
           }
-          
+
           if (responsesResponse.ok) {
             return responsesResponse
           }