Erlang server overhaul (#19465)

* Upgrade erlang-server code generation and fix is_authorized crashes

* Introduce structured logging

* Improve general formatting

* Update generated files

* Enable erlang server on CI

* Add echo-server testing to CI

* Require OTP27 explicitly in the generated rebar.config file

* Rework handler and API

With this work, json validation becomes optional, fully implemented in
the `_api` module as it was before, but without being forcibly called by
the `_handler`. It is instead left as optional for the user to take
advantage of the exposed callbacks. Jesse also chooses draft-06 as a
default, but these can be chosen manually by the user too, as long as
jesse implements them.

`_handler` also becomes lighter, it now handles all mime types
transparently by forwarding to a user-given module that must implement
`accept_callback/4` and `provide_callback/4` as described in the
`_logic_handler` callbacks. These will simply be the return values of
cowboy_rest's `content_types_accepted` and `content_types_provided`
respectively, and should simply comply with their defined APIs. They
only get two parameters extending the behaviour, so that the user-given
callback can pattern-match on them: the path prefix of the logic
handler, and the operationID of the call.

* Fix return types for provide_callbacks

* Upgrade jesse to incur no dependencies

The less dependencies the built code requires the better.

* Fix dialyzer errors in the generated code

* Apply stronger dialyzer checks

.github/workflows/samples-erlang.yaml

@@ -3,33 +3,33 @@ name: Samples Erlang
 on:
   push:
     paths:
-      # comment out due to errors
-      # ===> Compiling src/openapi_pet_handler.erl failed
-      # src/openapi_pet_handler.erl:278: function is_authorized/2 already defined
-      #- samples/server/petstore/erlang-server/**
+      - samples/server/echo_api/erlang-server/**
+      - samples/server/petstore/erlang-server/**
       - samples/client/petstore/erlang-client/**
       - samples/client/petstore/erlang-proper/**
   pull_request:
     paths:
-      #- samples/server/petstore/erlang-server/**
+      - samples/server/echo_api/erlang-server/**
+      - samples/server/petstore/erlang-server/**
       - samples/client/petstore/erlang-client/**
       - samples/client/petstore/erlang-proper/**
 jobs:
   build:
     name: Build Erlang projects
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
         sample:
-          #- samples/server/petstore/erlang-server/
+          - samples/server/echo_api/erlang-server/
+          - samples/server/petstore/erlang-server/
           - samples/client/petstore/erlang-client/
           - samples/client/petstore/erlang-proper/
     steps:
       - uses: actions/checkout@v4
       - uses: erlef/setup-beam@v1
         with:
-          otp-version: '22.2'
-          rebar3-version: '3.14.3'
+          otp-version: '27'
+          rebar3-version: '3.23.0'
       - run: rebar3 compile
         working-directory: ${{ matrix.sample }}