passepartout: v0.5.0 — File Reorganization & Token Economics

File Reorganization:
- Extracted core-context → symbolic-awareness (skill)
- Extracted heartbeat → symbolic-events (skill)
- Relocated 6 utility fragments, renamed 23 files, deleted system-model.lisp
- Renamed gateway-* → channel-*, split gateway-messaging → 4 channel-* files
- Renamed defskill/defpackage names to match new file prefixes
- Deleted gateway-messaging.org/.lisp, removed core-context filter
- Documented self-repair criterion, added AGENTS.md core boundary rule

Token Economics (v0.5.0, skills not core):
- tokenizer.lisp: count-tokens, model-token-ratio, token-cost, provider-token-cost (11 tests)
- cost-tracker.lisp: cost-track-call, cost-session-total, cost-by-provider (6 tests)
- token-economics.lisp: prompt-prefix-cached, context-assemble-cached,
  enforce-token-budget with CONTEXT_MAX_TOKENS env var (9 tests)

Bug Fixes:
- Fixed DeepSeek 400 (removed malformed tools from cascade)
- Fixed UNDEFINED-FUNCTION crash (fboundp guards in think())
- Fixed gate-trace duplication (setf replaces list* in cognitive-verify)
- Tightened dexador connect-timeout 10s→5s

Test suite: 116/116 (100%)

org/symbolic-events.org

@@ -30,7 +30,7 @@ The default classifier uses keywords in the context to determine the tier: ~rm~,
 ** Package definition
 
 #+begin_src lisp
-(defpackage :passepartout.system-event-orchestrator
+(defpackage :passepartout.symbolic-events
   (:use :cl :passepartout)
   (:export
    :orchestrator-register-hook
@@ -45,7 +45,7 @@ The default classifier uses keywords in the context to determine the tier: ~rm~,
    :*cron-registry*
    :*tier-classifier*))
 
-(in-package :passepartout.system-event-orchestrator)
+(in-package :passepartout.symbolic-events)
 #+end_src
 
 ** Registries
@@ -339,7 +339,7 @@ If heartbeat is corrupted or missing, the agent has no background ticks — no c
 The orchestrator registers as a skill with low priority so it runs after critical skills (policy, dispatcher) but before the heartbeat processing. The trigger matches ~:heartbeat~ sensor events.
 
 #+begin_src lisp
-(defskill :passepartout-system-event-orchestrator
+(defskill :passepartout-symbolic-events
   :priority 80
   :trigger (lambda (ctx)
              (eq (getf (getf ctx :payload) :sensor) :heartbeat))