Integrate OpenTelemetry into OpenDC

This pull request resolves issue #91 by adopting the industry-standard OpenTelemetry standard
for collecting traces and metrics in OpenDC simulations:

* Metrics will now be exposed through OpenTelemetry's metrics API
* `opendc-telemetry` provides complementary code to support
    gathering telemetry in OpenDC.

**Breaking API Changes**
* `opendc-tracer` has been removed.
* `EventFlow` and all usages of it have been removed.
* `opendc-experiments-sc18` has been removed for now, but a 
    suitable replacement will follow soon.

1 files changed, 2 insertions, 1 deletions

diff --git a/simulator/opendc-workflow/opendc-workflow-service/build.gradle.kts b/simulator/opendc-workflow/opendc-workflow-service/build.gradle.kts
index bec18ae9..040a9ff6 100644
--- a/simulator/opendc-workflow/opendc-workflow-service/build.gradle.kts
+++ b/simulator/opendc-workflow/opendc-workflow-service/build.gradle.kts
@@ -33,13 +33,14 @@ dependencies {
     api(platform(project(":opendc-platform")))
     api(project(":opendc-workflow:opendc-workflow-api"))
     api(project(":opendc-compute:opendc-compute-api"))
-    api(project(":opendc-trace:opendc-trace-core"))
+    api(project(":opendc-telemetry:opendc-telemetry-api"))
     implementation(project(":opendc-utils"))
     implementation("io.github.microutils:kotlin-logging")
 
     testImplementation(project(":opendc-simulator:opendc-simulator-core"))
     testImplementation(project(":opendc-compute:opendc-compute-simulator"))
     testImplementation(project(":opendc-format"))
+    testImplementation(project(":opendc-telemetry:opendc-telemetry-sdk"))
     testImplementation("com.fasterxml.jackson.module:jackson-module-kotlin:${versions["jackson-module-kotlin"]}")
     testRuntimeOnly("org.apache.logging.log4j:log4j-slf4j-impl")
 }