refactor(hive-c0re): group src-root files into submodules

stores/ (sqlite-backed host stores + db helper), stats/, agent_config/,
workers/ — pure git-mv moves; crate-root re-exports keep every
crate::<module> path compiling. flake_check stays at root (synchronous
approval-flow validation, not a background worker)

hive-c0re/src/agent_config/mod.rs

@@ -0,0 +1,10 @@
+//! Per-agent configuration registries: tool groups, capabilities,
+//! topology (all JSON files under `/var/lib/hyperhive/meta/`) and the
+//! shared wire-protocol size limits. Each submodule is re-exported at
+//! the crate root, so `crate::topology::…` etc. keep working
+//! unchanged.
+
+pub mod capabilities;
+pub mod limits;
+pub mod tool_groups;
+pub mod topology;

hive-c0re/src/lib.rs

@@ -11,45 +11,45 @@
 //! Every module is re-exported `pub` so anything in the crate is
 //! addressable from either binary; the lib doesn't have a curated
 //! surface beyond "this is where the modules live".
+//!
+//! Cohesive clusters live in directory submodules (`stores`, `stats`,
+//! `agent_config`, `workers`); each of their children is re-exported
+//! at the crate root so pre-existing `crate::broker::…` /
+//! `hive_c0re::broker::…` paths keep compiling unchanged.
 
 pub mod actions;
-pub mod agent_sockets;
-pub mod approvals;
-pub mod audit_log;
-pub mod auto_update;
-pub mod broker;
-pub mod build_logs;
-pub mod capabilities;
+pub mod agent_config;
 pub mod client;
-pub mod container_stats;
 pub mod container_view;
 pub mod coordinator;
-pub mod crash_watch;
 pub mod dashboard;
 pub mod dashboard_events;
-pub mod db;
 pub mod flake_check;
 pub mod forge;
 pub mod gateway_nginx;
-pub mod hive_stats;
-pub mod host_stats;
 pub mod job_queue;
-pub mod knowledge;
 pub mod lifecycle;
-pub mod limits;
 pub mod loose_ends;
 pub mod matrix;
 pub mod meta;
 pub mod migrate;
-pub mod operator_questions;
 pub mod paths;
-pub mod power;
 pub mod priv_client;
 pub mod questions;
-pub mod reminder_scheduler;
-pub mod scheduled_prompts;
-pub mod scheduled_prompts_worker;
 pub mod server;
 pub mod socket_server;
-pub mod tool_groups;
-pub mod topology;
+pub mod stats;
+pub mod stores;
+pub mod workers;
+
+// Root re-exports: keep every pre-grouping `crate::<module>` /
+// `hive_c0re::<module>` path compiling without touching consumers.
+pub use agent_config::{capabilities, limits, tool_groups, topology};
+pub use stats::{container_stats, hive_stats, host_stats};
+pub use stores::{
+    approvals, audit_log, broker, build_logs, db, operator_questions, power, scheduled_prompts,
+};
+pub use workers::{
+    agent_sockets, auto_update, crash_watch, knowledge, reminder_scheduler,
+    scheduled_prompts_worker,
+};

hive-c0re/src/stats/mod.rs

@@ -0,0 +1,8 @@
+//! Metrics aggregation for the dashboard: hive-wide turn-stats
+//! rollups, host-system probes / server warnings, and live
+//! per-container cgroup load. Each submodule is re-exported at the
+//! crate root, so `crate::hive_stats::…` etc. keep working unchanged.
+
+pub mod container_stats;
+pub mod hive_stats;
+pub mod host_stats;

hive-c0re/src/stores/mod.rs

@@ -0,0 +1,14 @@
+//! Sqlite-backed host-side stores (broker, approval / question /
+//! schedule queues, build logs, audit trail, power intent) plus the
+//! shared connection open/migration helper (`db`). Each submodule is
+//! re-exported at the crate root, so `crate::broker::…` etc. keep
+//! working unchanged.
+
+pub mod approvals;
+pub mod audit_log;
+pub mod broker;
+pub mod build_logs;
+pub mod db;
+pub mod operator_questions;
+pub mod power;
+pub mod scheduled_prompts;

hive-c0re/src/workers/mod.rs

@@ -0,0 +1,12 @@
+//! Background tasks and periodic sweeps: crash/login watcher, the
+//! reminder and scheduled-prompt delivery loops, boot-time auto-update
+//! reconcile, the agent-sockets.json writer loop, and knowledge-repo
+//! sync. Each submodule is re-exported at the crate root, so
+//! `crate::crash_watch::…` etc. keep working unchanged.
+
+pub mod agent_sockets;
+pub mod auto_update;
+pub mod crash_watch;
+pub mod knowledge;
+pub mod reminder_scheduler;
+pub mod scheduled_prompts_worker;