chore: add project plan, research, evidence, and workflow artifacts

.sisyphus/evidence/final-qa/test3-http-transport.txt

@@ -0,0 +1,13 @@
+=== HTTP Transport Test Results ===
+
+1. Server started on port 13579 with MCP_TRANSPORT=http
+2. Initialize request: PASS - Got valid SSE response with serverInfo
+3. tools/list request: PASS - Got all 9 tools via HTTP
+4. 404 for wrong path: PASS - HTTP Status: 404
+5. Response format: SSE (event: message, data: {...})
+
+Initialize response snippet:
+  event: message
+  data: {"result":{"protocolVersion":"2024-11-05","capabilities":{"logging":{},"tools":{"listChanged":true}},"serverInfo":{"name":"sage-x3-mcp","version":"1.0.0"}},"jsonrpc":"2.0","id":1}
+
+tools/list: returned 9 tools (verified same as stdio transport)