fix(scaffold): correct entity ID format in generated tests

When generating test files with --index-events, the entity ID format was
using the old string concatenation format ('-1') instead of the format
produced by concatI32() ('01000000'). This caused all generated tests to
fail out-of-the-box.

Changes:
- Update entity ID in test assertions from '-1' to '01000000' format
- Improve comment to explain concatI32() encoding with little-endian bytes
- Correct terminology from "default address" to "default transaction hash"

This fixes a bug introduced in commit 34aee49 (Oct 2022) when Bytes as ID
with @immutable was implemented. The mapping and schema templates were
updated but the test template was missed.

Author: AndreMiras

packages/cli/src/scaffold/__snapshots__/ethereum.test.ts.snap

@@ -315,34 +315,36 @@ describe("Describe entity assertions", () => {
   test("ExampleEvent created and stored", () => {
     assert.entityCount("ExampleEvent", 1)
 
-    // 0xa16081f360e3847006db660bae1c6d1b2e17ec2a is the default address used in newMockEvent() function
+    // 0xa16081f360e3847006db660bae1c6d1b2e17ec2a is the default transaction hash used in newMockEvent() function
+    // When indexEvents is true, entity ID uses concatI32() which appends log index as little-endian bytes
+    // Default log index 1 becomes: 01000000 (4 bytes: 0x01 0x00 0x00 0x00)
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "a",
       "234"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "b",
       "[1234567890]"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "param2",
       "Example string value"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "c",
       "ethereum.Tuple Not implemented"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "d",
       "Example string value"
     )
@@ -482,34 +484,36 @@ describe("Describe entity assertions", () => {
   test("ExampleEvent created and stored", () => {
     assert.entityCount("ExampleEvent", 1)
 
-    // 0xa16081f360e3847006db660bae1c6d1b2e17ec2a is the default address used in newMockEvent() function
+    // 0xa16081f360e3847006db660bae1c6d1b2e17ec2a is the default transaction hash used in newMockEvent() function
+    // When indexEvents is true, entity ID uses concatI32() which appends log index as little-endian bytes
+    // Default log index 1 becomes: 01000000 (4 bytes: 0x01 0x00 0x00 0x00)
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "a",
       "234"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "b",
       "[1234567890]"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "param2",
       "Example string value"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "c",
       "ethereum.Tuple Not implemented"
     )
     assert.fieldEquals(
       "ExampleEvent",
-      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a-1",
+      "0xa16081f360e3847006db660bae1c6d1b2e17ec2a01000000",
       "d",
       "Example string value"
     )

packages/cli/src/scaffold/tests.ts

@@ -91,7 +91,7 @@ const generateFieldsAssertions = (entity: string, eventInputs: any[], indexEvent
       (input, index) =>
         `assert.fieldEquals(
     "${entity}",
-    "0xa16081f360e3847006db660bae1c6d1b2e17ec2a${indexEvents ? '-1' : ''}",
+    "0xa16081f360e3847006db660bae1c6d1b2e17ec2a${indexEvents ? '01000000' : ''}",
     "${input.name || `param${index}`}",
     "${expectedValue(ascTypeForEthereum(input.type))}"
   )`,
@@ -171,7 +171,9 @@ const generateExampleTest = (
     test("${entity} created and stored", () => {
       assert.entityCount('${entity}', 1)
 
-      // 0xa16081f360e3847006db660bae1c6d1b2e17ec2a is the default address used in newMockEvent() function
+      // 0xa16081f360e3847006db660bae1c6d1b2e17ec2a is the default transaction hash used in newMockEvent() function
+      // When indexEvents is true, entity ID uses concatI32() which appends log index as little-endian bytes
+      // Default log index 1 becomes: 01000000 (4 bytes: 0x01 0x00 0x00 0x00)
       ${generateFieldsAssertions(entity, eventInputs, indexEvents)}
 
       // More assert options: