Evolve genai_demo_event to working POC with real embeddings

Transform genai_demo_event.cpp from skeleton to working POC that:
- Integrates with real llama-server on port 8013 for embeddings
- Uses shared memory (passing pointers, not copying data)
- Supports single or multiple documents per request
- Properly transfers memory ownership between GenAI and client

Architecture changes:
- Document struct: passed by pointer from client to GenAI
- RequestHeader: includes document_count and operation type
- ResponseHeader: includes embedding_size and embedding_ptr
- EmbeddingResult: allocated by GenAI, owned by client after response

libcurl integration:
- HTTP POST to llama-server embedding API
- JSON parsing of embedding responses
- Error handling for network/API failures

Key features:
- Clients wait for response before sending next request
- (ensures document pointers remain valid)
- GenAI workers handle multiple concurrent requests
- Embedding dimension: 1023 floats (from llama-server)
- Processing time: 30-250ms (real API latency)

Results:
- 5 clients completed 9 embedding requests
- All embeddings successfully retrieved
- Zero-copy data transfer via shared memory pointers
- Early termination when all work completed

Future-ready:
- Operation enum (OP_EMBEDDING, OP_COMPLETION, OP_RAG)
- Extensible for other GenAI operations
- Document count supports batch processing

genai_prototype/Makefile

@@ -3,7 +3,9 @@
 
 CXX = g++
 CXXFLAGS = -std=c++17 -Wall -Wextra -O2 -g
-LDFLAGS = -lpthread
+LDFLAGS = -lpthread -lcurl
+CURL_CFLAGS = $(shell curl-config --cflags)
+CURL_LDFLAGS = $(shell curl-config --libs)
 
 # Target executables
 TARGET_THREAD = genai_demo
@@ -29,7 +31,7 @@ genai_demo: genai_demo.o
 
 genai_demo_event: genai_demo_event.o
 	@echo "Linking genai_demo_event..."
-	$(CXX) genai_demo_event.o $(LDFLAGS) -o genai_demo_event
+	$(CXX) genai_demo_event.o $(CURL_LDFLAGS) $(LDFLAGS) -o genai_demo_event
 	@echo "Build complete: genai_demo_event"
 
 # Compile source files
@@ -39,7 +41,7 @@ genai_demo.o: genai_demo.cpp
 
 genai_demo_event.o: genai_demo_event.cpp
 	@echo "Compiling $<..."
-	$(CXX) $(CXXFLAGS) -c $< -o $@
+	$(CXX) $(CXXFLAGS) $(CURL_CFLAGS) -c $< -o $@
 
 # Run the demos
 run: $(TARGET_THREAD)