Remove fibonacci endpoint per specification - keep implementation minimal

Co-authored-by: trask <218610+trask@users.noreply.github.com>

Author: Copilot

reference-application/E2E-TEST.md

@@ -49,9 +49,7 @@ The test verifies:
 - `GET /rolldice` - Basic dice rolling
 - `GET /rolldice?player=testuser` - Parameterized requests
 - `GET /rolldice?rolls=3` - Multiple dice rolls
-- `GET /fibonacci?n=10` - Computational example
 - `GET /health` - Health check
-- `GET /actuator/prometheus` - Metrics export
 
 ### OpenTelemetry Integration
 - Java Agent instrumentation

reference-application/README.md

@@ -22,9 +22,7 @@ The reference application is a dice rolling service that demonstrates OpenTeleme
 - `GET /rolldice` - Basic dice roll (returns random 1-6)
 - `GET /rolldice?player=<name>` - Dice roll for a specific player
 - `GET /rolldice?rolls=<n>` - Roll multiple dice
-- `GET /fibonacci?n=<number>` - Calculate fibonacci (demonstrates computation tracing)
 - `GET /health` - Health check endpoint
-- `GET /metrics` - Prometheus metrics endpoint (when enabled)
 
 ### Scenarios Demonstrated
 
@@ -56,7 +54,7 @@ Then test the endpoints:
 ```shell
 curl http://localhost:8080/rolldice
 curl http://localhost:8080/rolldice?player=alice
-curl http://localhost:8080/fibonacci?n=10
+curl http://localhost:8080/rolldice?rolls=3
 ```
 
 ### Running with OpenTelemetry Collector

reference-application/TELEMETRY-TESTING.md

@@ -30,16 +30,15 @@ Uses OpenTelemetry protocol buffers to parse captured requests:
 
 ### Traces
 - **HTTP spans**: Automatic instrumentation spans (e.g., `GET /rolldice`)
-- **Custom spans**: Manual spans created in application code (e.g., `roll-dice`, `fibonacci-calculation`)
+- **Custom spans**: Manual spans created in application code (e.g., `roll-dice`)
 - **Span hierarchy**: Parent-child relationships between spans
-- **Attributes**: Custom attributes like `dice.player`, `fibonacci.n`
-- **Events**: Custom events like `dice-rolled`, `fibonacci-calculated`
+- **Attributes**: Custom attributes like `dice.player`, `dice.rolls`
+- **Events**: Custom events like `dice-rolled`
 - **Error handling**: Exception recording and error status
 
 ### Metrics
-- **Custom counters**: `dice_rolls_total`, `fibonacci_calculations_total`
-- **Custom timers**: `dice_roll_duration_seconds`, `fibonacci_duration_seconds`
-- **Micrometer integration**: Metrics created via Micrometer and exported via OpenTelemetry
+- **Custom counters**: `dice_rolls_total`
+- **OpenTelemetry metrics**: Metrics created via OpenTelemetry API and exported by the Java Agent
 
 ### Baggage
 - **Cross-cutting data**: Player names, request types
@@ -59,7 +58,7 @@ public void testDiceRollTelemetry() {
         var spans = extractSpansFromRequests(requests);
         assertThat(spans)
             .extracting(Span::getName)
-            .contains("GET /rolldice", "roll-dice", "roll-single-die");
+            .contains("GET /rolldice", "roll-dice");
     });
 }
 ```

reference-application/src/main/java/io/opentelemetry/example/FibonacciController.java

@@ -62,18 +62,6 @@ void testRollMultipleDice() throws Exception {
     assertEquals(3, json.get("results").size());
   }
 
-  @Test
-  void testFibonacci() throws Exception {
-    ResponseEntity<String> response =
-        restTemplate.getForEntity("http://localhost:" + port + "/fibonacci?n=10", String.class);
-
-    assertEquals(200, response.getStatusCode().value());
-
-    JsonNode json = objectMapper.readTree(response.getBody());
-    assertEquals(10, json.get("n").asInt());
-    assertEquals("55", json.get("result").asText());
-  }
-
   @Test
   void testHealth() throws Exception {
     ResponseEntity<String> response =

reference-application/src/test/java/io/opentelemetry/example/ReferenceApplicationTests.java

@@ -77,16 +77,6 @@ test_endpoints() {
         return 1
     fi
 
-    # Test fibonacci endpoint
-    print_status "Testing /fibonacci?n=10 endpoint..."
-    response=$(curl -sf "http://localhost:8080/fibonacci?n=10")
-    if echo "$response" | jq -r '.result' | grep -q "55"; then
-        print_status "✓ /fibonacci endpoint working"
-    else
-        print_error "✗ /fibonacci endpoint failed"
-        return 1
-    fi
-    
     # Test health endpoint
     print_status "Testing /health endpoint..."
     response=$(curl -sf http://localhost:8080/health)
@@ -125,7 +115,7 @@ test_collector() {
 
     # Generate some telemetry data
     curl -sf http://localhost:8080/rolldice > /dev/null
-    curl -sf http://localhost:8080/fibonacci?n=5 > /dev/null
+    curl -sf http://localhost:8080/rolldice?rolls=3 > /dev/null
 
     # Wait a bit for data to be processed
     sleep 5