62 enhancement support for 2025 11 25 version of mcp (#64)

2026-06-04 v1.0
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 + Support for 2025-11-25 protocol version
 + Tasks: background task lifecycle with tasks/list, tasks/get, tasks/result, and tasks/cancel
     - ZCL_MCP_TASKS persists tasks in new ZMCP_TASKS table
     - ZIF_MCP_TASK_EXECUTOR connects tools to background jobs/RFCs
     - ZMCP_CLEAR_MCP_TASKS deletes expired task records
 + Completion: completion/complete endpoint for prompt and resource-template argument autocomplete
 + DDIC Schema Builder: ZCL_MCP_SCHEMA_BUILDER_DDIC auto-generates JSON schemas from DDIC structures
 + Tools: optional output_schema declaration and task_support execution mode on tool definitions
 + Prompts, resources, tools, and server info now support 2025-11-25 metadata additions such as titles, annotations, and icons
 + New demos: ZCL_MCP_DEMO_SERVER_DDIC and ZMCP_DEMO_BG_TASK

 ! BREAKING (MCP-managed sessions only): MCP sessions are now bound to the creating user
   (new CREATED_BY column in ZMCP_SESSIONS). This only affects servers using ZCL_MCP_SESSION-based
   session management; stateless and ICF-session servers are unaffected.
   Existing session records will have an empty CREATED_BY after table conversion and will be rejected.
   Run ZMCP_CLEAR_MCP_SESSIONS before activating the new code to prevent unexpected session errors
   for connected clients.

 ! BREAKING: ZCL_MCP_RESP_INITIALIZE capabilities structure changed.
   The PROMPTS, RESOURCES, and TOOLS fields in the CAPABILITIES type changed from ABAP_BOOL to nested
   structs (PROMPTS_CAPABILITY, RESOURCES_CAPABILITY, TOOLS_CAPABILITY). Replace direct boolean
   assignments such as CAPABILITIES-PROMPTS = ABAP_TRUE with CAPABILITIES-PROMPTS-ENABLED = ABAP_TRUE.

 ! BREAKING: Local ANNOTATIONS types removed from response classes.
   ZCL_MCP_RESP_CALL_TOOL=>ANNOTATIONS, ZCL_MCP_RESP_GET_PROMPT=>ANNOTATIONS,
   ZCL_MCP_RESP_LIST_RESOURCES=>ANNOTATIONS, and ZCL_MCP_RESP_LIST_RES_TMPL=>ANNOTATIONS have been
   removed. Replace any references with ZIF_MCP_TYPES=>ANNOTATIONS (structure is identical).

 ! BREAKING: Batch JSON-RPC API removed from ZCL_MCP_JSONRPC.
   PARSE_BATCH_REQUEST, SERIALIZE_BATCH_RESPONSE, and the REQUESTS/RESPONSES table types have been
   removed. Batch processing was never part of the MCP specification and is not supported by clients.

Add support for protocol version 2025 06 18 (#54)

* Add basic support for 2025-06-18 header

* Remove json-rpc batch support

* Extend _meta and ajson slash in key support

* Add title to more entries

* Annotations, meta, output schema, structured outpu

* Update documentation for 2025-06-18

* Update demos 

* Update changelog

Merge branch 'main' of https://github.com/abap-ai/mcp

5 full testsuite for the mcp server (#6)

* Add testsuite with MCP typescript SDK

Simplifications to support downport