fix(quick-router): drop a trailing "please" from memory_forget and play_media queries

[davion-knight]

Fixes #692

Summary

A polite trailing "please" leaked into the query argument of two quick-router
tools, so the argument no longer matched what the user meant:

Utterance	Tool	Before	Expected
forget my old locker combination please	memory_forget	old locker combination please	old locker combination
play my study playlist please	play_media	my study playlist please	my study playlist

memory_forget matches the stored fact by this query, so the trailing "please"
made it miss the memory the user asked to forget.

Changes

• memory_forget_query and play_media_request
  (crates/genie-core/src/tools/quick.rs): strip a trailing " please" from the
  extracted query, mirroring the existing clean_control_entity handling for
  home control. Queries without "please" are unchanged, and a bare
  "forget it please" still abstains for the LLM (the remainder is a bare
  pronoun after stripping).
• Extend the existing routes_forget_command_to_memory_forget and
  routes_playlist_requests_to_media tests with the "please" phrasings.

Real Behavior Proof

• I have built and run the affected code locally (or noted why I could not).
• I have verified the change end-to-end on Jetson hardware.
• I have NOT verified on Jetson hardware, and I explain the equivalent verification path or validation gap below.

Tested profile / hardware (check all that apply):

• jetson
• raspberry_pi
• portable_sbc
• laptop
• mac
• CI-only / docs-only
• Not run locally

What I ran

x86_64 Linux laptop, stable Rust (cargo 1.96.1). The changed code is
platform-agnostic string routing (str::trim_end_matches), so an x86_64 build
exercises the exact logic that runs on Jetson. I extended the regression tests
first and ran them against unmodified main to confirm the bug, then applied
the fix:

# Repro (before fix): FAILS
cargo test -p genie-core --lib routes_forget_command_to_memory_forget
cargo test -p genie-core --lib routes_playlist_requests_to_media
# After fix + no regressions:
cargo test -p genie-core --lib
cargo fmt -p genie-core -- --check
cargo clippy -p genie-core --all-targets --locked -- -D warnings
cargo clippy -p genie-core --no-default-features --locked -- -D warnings

What I observed

• Repro before fix: the two tests failed —
  left: "old locker combination please", right: "old locker combination" and
  left: "my study playlist please", right: "my study playlist".
• After fix: genie-core --lib 848 passed / 0 failed / 4 ignored. The
  existing no-"please" forget/media cases and the forget it abstain cases pass
  unchanged.
• fmt: clean. clippy (default and --no-default-features): 0 warnings.