Ignore forked-session replay in usage parsing

Add logic to detect and ignore replayed events from forked sessions so they don't inflate usage totals, while still counting new post-fork activity. Bump the scan-cache DB schema to v3 and add a migration that clears stale cache rows that must be reparsed under the new semantics. Introduce ForkReplayState and related helpers (maybe_start_fork_replay, fork_replay_should_skip_event, note_fork_replay_token) and update parsing/scan flows to skip replayed events but preserve token-count bookkeeping. Add timestamp parsing helper and tests covering fork-replay behavior, cache migration, and snapshot computation. Also bump package version to 0.3.4, update CHANGELOG/README, and add /temp to .gitignore.

Author: ssh4net

.gitignore

@@ -4,3 +4,4 @@
 /dist
 /dist_*
 /internal
+/temp

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 All notable changes to this project are documented in this file.
 
+## 0.3.4 - 2026-04-24
+
+- Fixed inflated usage totals from forked/subagent session logs by ignoring replayed parent-session token history while preserving new post-fork usage.
+- Bumped the scan-cache schema to reparse stale forked-session cache rows.
+
 ## 0.3.3 - 2026-03-18
 
 - Added a built-in Session history screen to the main `comon` TUI:

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "comon"
-version = "0.3.3"
+version = "0.3.4"
 edition = "2021"
 license = "Apache-2.0"
 

Cargo.toml

@@ -16,8 +16,10 @@ See `CHANGELOG.md` for release history.
 <img width="2088" height="952" alt="WindowsTerminal_HjIAOZQKWE" src="https://github.com/user-attachments/assets/4e3eed0a-d3aa-4ae5-bc4e-c6e5400bc1dd" />
 
 
-## Release 0.3.3
+## Release 0.3.4
 
+- Fixed inflated usage totals from forked/subagent session logs.
+- Reparse stale forked-session cache rows with scan-cache schema v3.
 - Merged the session-history browser into the main `comon` TUI.
 - Added runtime screen switching between Usage and Session history with `s` / `F2`.
 - Added `--read` to start on the Session history screen.