merge: reconcile companion cleanup with fix-general-tidy

Merge the maintainer's fix-general-tidy branch (neighbor discovery,
keygen, API endpoints, web-asset rebuild, HTTP server config/control
commands, and an independent #286 room-server push/ACK/guest fix) into
the companion cleanup branch.

Both branches fixed #286 in parallel with byte-identical push-ACK CRC
logic. In the six overlapping files the maintainer's implementation is
kept (ACL replay-detection/session helpers, encoded path-len with legacy
fallback, expected_crc/ack_timeout_s injector API, dispatcher ACK
helpers); this branch's unique companion work is preserved on top
(sender_prefix persistence + migration, boot-state hardening /
CompanionStateLoadError, MessageQueue.max_size, older-core fallbacks).

Conflict resolution took the maintainer's side across the overlap, then
fixed two integration seams the merge introduced and updated this
branch's tests to the maintainer's API:
- room_server: timeout used undefined `hops`; aligned to `path_len`.
- packet_router: PATH helper was invoked twice (maintainer's
  unconditional call plus this branch's conditional local-identity
  call); dropped the now-redundant conditional block.

Pin openhop_core to @dev (was @feature/publish-workflow-message-handling)
so this can merge to the repeater's dev; core dev carries the required
sender_prefix and PathUtils.is_valid_path_len APIs.

Full suite green (1040 passed) against openhop_core dev and
refactor/companion-housekeeping; ruff clean.

pyproject.toml

@@ -29,7 +29,7 @@ keywords = ["mesh", "networking", "lora", "repeater", "daemon", "iot"]
 
 
 dependencies = [
-    "openhop_core[hardware]",
+    "openhop_core[hardware] @ git+https://github.com/openhop-dev/openhop_core.git@dev",
     "pyyaml>=6.0.0",
     "cherrypy>=18.0.0",
     "paho-mqtt>=1.6.0",
@@ -45,7 +45,7 @@ dependencies = [
 [project.optional-dependencies]
 # SX1262/SPI support (Linux only; required for Raspberry Pi HATs)
 hardware = [
-    "openhop_core[hardware]",
+    "openhop_core[hardware] @ git+https://github.com/openhop-dev/openhop_core.git@dev",
 ]
 # RRD metrics (Performance Metrics chart); system librrd required (e.g. apt install rrdtool)
 rrd = [