feat: add WS, SSE, Pub/Sub, RabbitMQ, and EventBridge protocol linkers

Sessions 4-5 of the C rewrite: 5 new protocol linkers with 63 tests.

- servicelink_ws.c: WebSocket endpoint/client discovery, path matching
- servicelink_sse.c: SSE endpoint/client discovery, path matching
- servicelink_pubsub.c: GCP Pub/Sub topic extraction and matching
- servicelink_rabbitmq.c: AMQP publisher/consumer with exchange-type-aware
  routing and topic wildcard matching (*/# via DP algorithm)
- servicelink_eventbridge.c: EventBridge put_events/event_rule with
  compound source:detail_type matching
- 4 stubs remain (mqtt, nats, redis_pubsub, trpc)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: claude

Makefile.cbm

@@ -195,7 +195,12 @@ PIPELINE_SRCS = \
     src/pipeline/servicelink_grpc.c \
     src/pipeline/servicelink_kafka.c \
     src/pipeline/servicelink_sqs.c \
-    src/pipeline/servicelink_sns.c
+    src/pipeline/servicelink_sns.c \
+    src/pipeline/servicelink_ws.c \
+    src/pipeline/servicelink_sse.c \
+    src/pipeline/servicelink_pubsub.c \
+    src/pipeline/servicelink_rabbitmq.c \
+    src/pipeline/servicelink_eventbridge.c
 
 # SimHash / MinHash module
 SIMHASH_SRCS = src/simhash/minhash.c
@@ -322,6 +327,16 @@ TEST_SERVICELINK_SQS_SRCS = tests/test_servicelink_sqs.c
 
 TEST_SERVICELINK_SNS_SRCS = tests/test_servicelink_sns.c
 
+TEST_SERVICELINK_WS_SRCS = tests/test_servicelink_ws.c
+
+TEST_SERVICELINK_SSE_SRCS = tests/test_servicelink_sse.c
+
+TEST_SERVICELINK_PUBSUB_SRCS = tests/test_servicelink_pubsub.c
+
+TEST_SERVICELINK_RABBITMQ_SRCS = tests/test_servicelink_rabbitmq.c
+
+TEST_SERVICELINK_EVENTBRIDGE_SRCS = tests/test_servicelink_eventbridge.c
+
 TEST_CLI_SRCS = tests/test_cli.c
 
 TEST_MEM_SRCS = tests/test_mem.c
@@ -339,8 +354,13 @@ TEST_SERVICELINK_GRPC_SRCS = tests/test_servicelink_grpc.c
 TEST_SERVICELINK_KAFKA_SRCS = tests/test_servicelink_kafka.c
 TEST_SERVICELINK_SQS_SRCS = tests/test_servicelink_sqs.c
 TEST_SERVICELINK_SNS_SRCS = tests/test_servicelink_sns.c
+TEST_SERVICELINK_WS_SRCS = tests/test_servicelink_ws.c
+TEST_SERVICELINK_SSE_SRCS = tests/test_servicelink_sse.c
+TEST_SERVICELINK_PUBSUB_SRCS = tests/test_servicelink_pubsub.c
+TEST_SERVICELINK_RABBITMQ_SRCS = tests/test_servicelink_rabbitmq.c
+TEST_SERVICELINK_EVENTBRIDGE_SRCS = tests/test_servicelink_eventbridge.c
 
-ALL_TEST_SRCS = $(TEST_FOUNDATION_SRCS) $(TEST_EXTRACTION_SRCS) $(TEST_STORE_SRCS) $(TEST_CYPHER_SRCS) $(TEST_MCP_SRCS) $(TEST_DISCOVER_SRCS) $(TEST_GRAPH_BUFFER_SRCS) $(TEST_PIPELINE_SRCS) $(TEST_WATCHER_SRCS) $(TEST_LZ4_SRCS) $(TEST_SQLITE_WRITER_SRCS) $(TEST_GO_LSP_SRCS) $(TEST_C_LSP_SRCS) $(TEST_TRACES_SRCS) $(TEST_CLI_SRCS) $(TEST_MEM_SRCS) $(TEST_UI_SRCS) $(TEST_SECURITY_SRCS) $(TEST_YAML_SRCS) $(TEST_SIMHASH_SRCS) $(TEST_INTEGRATION_SRCS) $(TEST_SERVICELINK_GRAPHQL_SRCS) $(TEST_SERVICELINK_GRPC_SRCS) $(TEST_SERVICELINK_KAFKA_SRCS) $(TEST_SERVICELINK_SQS_SRCS) $(TEST_SERVICELINK_SNS_SRCS)
+ALL_TEST_SRCS = $(TEST_FOUNDATION_SRCS) $(TEST_EXTRACTION_SRCS) $(TEST_STORE_SRCS) $(TEST_CYPHER_SRCS) $(TEST_MCP_SRCS) $(TEST_DISCOVER_SRCS) $(TEST_GRAPH_BUFFER_SRCS) $(TEST_PIPELINE_SRCS) $(TEST_WATCHER_SRCS) $(TEST_LZ4_SRCS) $(TEST_SQLITE_WRITER_SRCS) $(TEST_GO_LSP_SRCS) $(TEST_C_LSP_SRCS) $(TEST_TRACES_SRCS) $(TEST_CLI_SRCS) $(TEST_MEM_SRCS) $(TEST_UI_SRCS) $(TEST_SECURITY_SRCS) $(TEST_YAML_SRCS) $(TEST_SIMHASH_SRCS) $(TEST_INTEGRATION_SRCS) $(TEST_SERVICELINK_GRAPHQL_SRCS) $(TEST_SERVICELINK_GRPC_SRCS) $(TEST_SERVICELINK_KAFKA_SRCS) $(TEST_SERVICELINK_SQS_SRCS) $(TEST_SERVICELINK_SNS_SRCS) $(TEST_SERVICELINK_WS_SRCS) $(TEST_SERVICELINK_SSE_SRCS) $(TEST_SERVICELINK_PUBSUB_SRCS) $(TEST_SERVICELINK_RABBITMQ_SRCS) $(TEST_SERVICELINK_EVENTBRIDGE_SRCS)
 
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