Add swift files to fallback list (#6724)

Author: niteshbalusu11

src/services/code-index/processors/__tests__/parser.vb.spec.ts

@@ -243,6 +243,7 @@ describe("Fallback Extensions Configuration", () => {
 		// Extensions that should use fallback
 		expect(shouldUseFallbackChunking(".vb")).toBe(true)
 		expect(shouldUseFallbackChunking(".scala")).toBe(true)
+		expect(shouldUseFallbackChunking(".swift")).toBe(true)
 
 		// Extensions that should not use fallback (have working parsers)
 		expect(shouldUseFallbackChunking(".js")).toBe(false)

src/services/code-index/shared/supported-extensions.ts

@@ -21,6 +21,7 @@ export const scannerExtensions = allExtensions
 export const fallbackExtensions = [
 	".vb", // Visual Basic .NET - no dedicated WASM parser
 	".scala", // Scala - uses fallback chunking instead of Lua query workaround
+	".swift", // Swift - uses fallback chunking due to parser instability
 ]
 
 /**