docs: remove hyphens from auto-X compounds per Microsoft.Auto style

Fixed 72 hyphenated 'auto-X' compounds across the docs by deleting
the hyphen to match Microsoft style guide (autogenerated, autoregistration,
autodiscovery, etc). Preserved original capitalization throughout.

Covered 26 documentation files in docs/, including README.md, agent-lifecycle,
integrations, scheduler, networking, process, tools, trust-boundary,
turn-loop, and web-ui sections.

docs/integrations/matrix.md

@@ -33,7 +33,7 @@ Two distinct hostnames:
   *irrevocably* in every `@user:<server_name>` and `!room:<server_name>`
   identifier minted on this homeserver. can't be changed later
   without abandoning every account and chat history. Defaults to the
-  bare `services.hyperhive.swarm.domain`; clients auto-discover the
+  bare `services.hyperhive.swarm.domain`; clients autodiscover the
   actual API endpoint via the `.well-known/matrix/{client,server}`
   routes the gateway serves at that domain.
 - **`gatewayHost`** — the API listener hostname, where the gateway's
@@ -167,7 +167,7 @@ Matrix client that groups all agent-to-agent + operator rooms in one
 place.
 
 The sweep also provisions a default **`hive-chat` room** as an
-`m.space.child` of the Space. Joining a Space doesn't auto-join
+`m.space.child` of the Space. Joining a Space doesn't autojoin
 child rooms — the explicit room entry ensures the operator and every
 agent can find a common chat room without manual setup. Room join is
 restricted (any Space member including the operator can join; agents
@@ -256,7 +256,7 @@ Both fixed in `nix/host-modules/hive-matrix.nix` via two derivations:
   `native_imaging` C source via `pkgs.emscripten`. Source comes
   from `pkgs.fluffychat-web.passthru.pubspecLock.dependencySources.native_imaging`
   — already in the build closure of the flutter app, so no parallel
-  hash pin and version auto-syncs with nixpkgs bumps. Build closure
+  hash pin and version autosyncs with nixpkgs bumps. Build closure
   is ~3.6 GiB (emscripten LLVM); runtime closure is just the two
   output files. `dontConfigure = true` because cmake runs inside
   `js/Makefile` via `emcmake cmake`, not at the package root. The