chore(bmad): migrate 80_bmad/base from 6.0.4 to 6.9 + port customizations to TOML overrides

Migration des modules via l'installer officiel (Quick update, en place) :
- core/bmm 6.0.4 -> 6.9.0
- tea 1.5.3 -> 1.19.0
- cis 0.1.8 -> 0.2.1

Portage des customisations Lead_tech vers le nouveau mécanisme d'overrides
(_bmad/custom/<skill>.toml, couche "team" résolue par resolve_customization.py) :
- 6 agents directs (analyst, architect, dev, pm, tech-writer, ux-designer)
- module tea
- workflows: dev-story, create-story, code-review, quick-dev, qa-generate-e2e-tests
- agents disparus en 6.9 reportés vers leurs workflows hôtes
  (QA -> code-review, SM -> create-story, quick-flow-solo-dev -> quick-dev)
- règle de capitalisation 95_a_capitaliser factorisée dans
  _bmad/custom/leadtech-capitalisation.md (référencée via persistent_facts)

Nettoyage du legacy 6.0.4 :
- suppression des 17 *.customize.yaml (non lus par 6.9)
- suppression des .bak générés par l'installer (contenu porté en .toml)
- suppression de 17 skills orphelins dans .agents/skills (anciens noms, .agents/.claude réalignés 66=66)
- suppression des coquilles de workflows disparus

Tous les overrides validés par le resolver officiel (12/12 JSON valide,
base préservée + ajouts Lead_tech). Le cœur (couche customize.toml) n'est plus modifié,
donc les updates 6.x futurs ne pourront plus écraser ces customisations.

Note env: resolve_customization.py exige Python >=3.11 (uv installé, python3 -> 3.12.13).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

80_bmad/base/.agents/skills/bmad-retrospective/customize.toml

@@ -0,0 +1,41 @@
+# DO NOT EDIT -- overwritten on every update.
+#
+# Workflow customization surface for bmad-retrospective. Mirrors the
+# agent customization shape under the [workflow] namespace.
+
+[workflow]
+
+# --- Configurable below. Overrides merge per BMad structural rules: ---
+#   scalars: override wins • arrays (persistent_facts, activation_steps_*): append
+#   arrays-of-tables with `code`/`id`: replace matching items, append new ones.
+
+# Steps to run before the standard activation (config load, greet).
+# Overrides append. Use for pre-flight loads, compliance checks, etc.
+
+activation_steps_prepend = []
+
+# Steps to run after greet but before the workflow begins.
+# Overrides append. Use for context-heavy setup that should happen
+# once the user has been acknowledged.
+
+activation_steps_append = []
+
+# Persistent facts the workflow keeps in mind for the whole run
+# (standards, compliance constraints, stylistic guardrails).
+# Distinct from the runtime memory sidecar — these are static context
+# loaded on activation. Overrides append.
+#
+# Each entry is either:
+#   - a literal sentence, e.g. "All retrospectives must produce SMART action items with named owners."
+#   - a file reference prefixed with `file:`, e.g. "file:{project-root}/docs/standards.md"
+#     (glob patterns are supported; the file's contents are loaded and treated as facts).
+
+persistent_facts = [
+  "file:{project-root}/**/project-context.md",
+]
+
+# Scalar: executed when the workflow reaches Step 13 (Final Summary and Handoff),
+# after the retrospective document is saved and sprint-status is updated. Override wins.
+# Leave empty for no custom post-completion behavior.
+
+on_complete = ""