feat(rtl): migrate CAM interface to handshake protocol with integrated noise generation

BREAKING CHANGE: CAM write and query interface replaced with standard valid/ready
handshake. wr_en/wr_row/wr_hash → wr_valid/wr_ready/wr_addr/write_hash.
External noise_mask_lanes_flat removed; noise generation now handled internally
by cam_noisy module with configurable rate via parameters.

- cam_top: add parameters (NOISE_EN, NOISE_RATE_NUM/DEN, NOISE_GEN/SAMPLE_BITS, NOISE_SEED)
- cam_top: replace cam_core with cam_noisy (integrated noise generation)
- match_engine: remove external noise_mask_lanes_flat input
- hw/sim: update Makefile with noise parameters and compile args
- hw/sim/model: add generate_write_flip_mask() and xorshift64() matching RTL behavior
- hw/sim/tests: adapt testbench to new handshake protocol

.justfile

@@ -5,15 +5,6 @@ export MSYS2_ENV_CONV_EXCL := "*"
 
 remote_ssh_target := env("REMOTE_SSH_TARGET")
 remote_docker_container := env("REMOTE_DOCKER_CONTAINER")
-remote_root := "$REMOTE_SSH_TARGET:$REMOTE_WORKDIR"
-rsync_flags := "-avLh --progress --stats --itemize-changes"
-upload_excludes := "--exclude-from=.rsyncignore"
-
-upload:
-    rsync {{ rsync_flags }} {{ upload_excludes }} . {{ remote_root }}/; \
-
-download:
-    rsync {{ rsync_flags }} {{ remote_root }}/outputs .; \
 
 sync-pkgs:
     uv sync --inexact
@@ -24,8 +15,6 @@ sync-data:
 
 ssh:
     ssh \
-    -L 127.0.0.1:22001:127.0.0.1:22000 \
-    -R 127.0.0.1:22001:127.0.0.1:22000 \
     -L 127.0.0.1:8385:127.0.0.1:8384 \
     -L 127.0.0.1:9098:127.0.0.1:9098 \
     -L 127.0.0.1:2718:172.30.0.2:2718 \