Purpose
-------
Provide local timing ledger and advisory report modules.
Responsibilities
----------------
- Keep local timing data bounded, private and advisory.
Diagnostics
-----------
Domain: GENERAL
Levels:
L1 -- instrumentation failures
L2 -- lifecycle
L3 -- semantic details
L4 -- deep tracing
Contracts
---------
- Timing instrumentation never changes the wrapped operation's outcome.
- Only the fixed timing schema is persisted; command arguments are never stored.
Dependencies
------------
- oc_diagnostics (structured timing diagnostics)
- oct.timing.tiers (re-exported: stage tiers and tier budgets)
- oct.core.diagnostics (_dbg structured logger; imported but never called here)