Duplicate key class `Parameter` when documenting two GET methods with same path and `PathVariable`, differing only by `produces` media type.

[ollio]

When defining two @GetMapping handlers for the same path (e.g. /{organizationId}/features) and each has a unique operationId but shares the same @PathVariable organizationId, Springdoc fails with:

java.lang.IllegalStateException: Duplicate key class Parameter { name: "organizationId", ... }

Although both methods use distinct produces media types (application/json vs application/x-ndjson), Springdoc’s internal parameter processing merges duplicates improperly.

Steps to Reproduce:

1. Define two GET methods in a @RestController with identical paths including {organizationId}, differing only in produces.
2. Annotate each with unique @Operation(operationId = "...").
3. Launch application and observe the exception due to duplicated parameter key.
4. Add @operation doc with documentation of the param: parameters = {
   @parameter(name = "organizationId", in = ParameterIn.PATH
   }

Expected Behavior:
Springdoc should either:

• Detect duplicate path parameters and include them only once in the OpenAPI spec, or
• Merge the two operations into one GET with multiple content types, or
• Cleanly support two operations on the same path when they differ only by response media type and have distinct operationIds.

Workaround:
I have removed the documentation of the parameter "organizationId".

Code example:

    @Operation(operationId = "getFeaturesJson", 
               parameters = {
                 @Parameter(name = "organizationId", in = ParameterIn.PATH
               })
    @GetMapping(value = "/{organizationId}/features", produces = MediaType.APPLICATION_JSON_VALUE)
    public List<Feature> getFeaturesAsJson(
        @PathVariable String organizationId) {
        return List.of(/* ... */);
    }

    @Operation(operationId = "getFeaturesNdjson",
              parameters = {
                 @Parameter(name = "organizationId", in = ParameterIn.PATH
              })
    @GetMapping(value = "/{organizationId}/features", produces = "application/x-ndjson")
    public Flux<Feature> getFeaturesAsNdjson(
        @PathVariable String organizationId) {
        return Flux.just(/* ... */);
    }