[wrossmorrow-pi-bot]

What

Fixes the remaining minor behavior misalignments in the echo and digest example processors, bringing them in line with the Go/Rust SDK semantics.

Changes

• Digest (DigestRequestProcessor):
  • Removed the extra x-extproc-response-digest header emission; only x-extproc-request-digest is set now (Go/Rust parity).
  • Fixed the digest input string: base is now method:path (no trailing colon), with :<body> appended at the body phase (Go/Rust parity).
• Echo (EchoRequestProcessor):
  • Response is now a raw echo (original body via immediate cancel) instead of a synthetic JSON body.
  • Path matching now uses the /echo/... regex (Go/Rust parity) instead of startsWith("/echo").
• README.md: updated the echo sample response and examples source path accordingly.

Verification

./gradlew clean build

-> BUILD SUCCESSFUL (spotless, tests, check).

Notes

• The missing router example/processor was verified to already exist and be wired; no change was needed there.