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/agent-lifecycle/persistence.md

@@ -439,7 +439,7 @@ On a btrfs host, a brand-new agent's state root is created as a
 **btrfs subvolume** instead of a plain directory (progressive
 enhancement — see the #1762 lane). This is a no-op fallback on
 non-btrfs hosts and for any agent whose root already exists, so
-nothing is auto-migrated: existing agents keep their plain dirs
+nothing is automigrated: existing agents keep their plain dirs
 until an explicit opt-in upgrade.
 
 - **Creation:** `lifecycle::ensure_agent_state_subvolume` runs before
@@ -548,7 +548,7 @@ streamable-http (`hyperhive.mcp.matrixHttpPort`, no stdio bridge —
 same shape as `hive-bash-daemon`), emits hyperhive wake signals
 on incoming room events via `/run/hive/mcp.sock`. Conditional on
 `hyperhive.matrix.enable` (which both the daemon AND the
-auto-injected `extraMcpServers.matrix` entry read).
+autoinjected `extraMcpServers.matrix` entry read).
 
 **First-boot ordering**: hive-c0re provisions the matrix token AFTER
 agent containers come up. Without the path-trigger sibling