fix: fix TypeScript strict mode type check issues for CI

Co-authored-by: DevilTea <16652879+DevilTea@users.noreply.github.com>

Author: Copilot

packages/internal/src/core/core.ts

@@ -115,7 +115,7 @@ export function createPipeExecutor(
 				return result
 			}
 			// Execute step synchronously
-			result = runtimeSteps[i](result)
+			result = runtimeSteps[i]!(result)
 		}
 		return result
 	}

packages/internal/src/steps/intersection/intersection.ts

@@ -94,7 +94,7 @@ export const intersection = implStepPlugin<PluginDef>({
 				if (isInvalid)
 					break
 
-				const branchResult = branches[i]['~execute'](value)
+				const branchResult = branches[i]!['~execute'](value)
 
 				if (branchResult instanceof Promise) {
 					// Hit async, chain remaining branches
@@ -104,7 +104,7 @@ export const intersection = implStepPlugin<PluginDef>({
 					})
 
 					for (let j = i + 1; j < len; j++) {
-						const jBranch = branches[j]
+						const jBranch = branches[j]!
 						chain = chain.then((invalid) => {
 							if (invalid)
 								return true

packages/internal/src/steps/union/union.ts

@@ -92,7 +92,7 @@ export const union = implStepPlugin<PluginDef>({
 
 			// Try each branch synchronously until we hit async or find success
 			for (let i = 0; i < len; i++) {
-				const branchResult = branches[i]['~execute'](value)
+				const branchResult = branches[i]!['~execute'](value)
 
 				if (branchResult instanceof Promise) {
 					// Hit async, chain remaining branches
@@ -104,7 +104,7 @@ export const union = implStepPlugin<PluginDef>({
 					})
 
 					for (let j = i + 1; j < len; j++) {
-						const jBranch = branches[j]
+						const jBranch = branches[j]!
 						chain = chain.then((result) => {
 							if (result.success)
 								return result