[LOADED_DOCS: 3 files, no new loads]

Update ID format to use per-repo prefixes and random suffix

Migrated all issue, TODO, and decision IDs to a new 4-part format: <PREFIX>-<TOPIC>-<TYPE>-<RAND>. Added per-repo prefix declarations in copilot-instructions.md and documented conventions in REPO_PREFIXES.md. Updated all topic registries, logs, cross-references, and documentation to use the new format. Introduced MIGRATION_ID_MAPPING.md for old-to-new ID mapping. Enhanced skills and protocol audit logic to validate and enforce per-repo prefixes and topic codes at runtime. Clarified Framework-First doctrine and ensured all references are unambiguous.

.github/copilot-instructions.md

@@ -93,6 +93,7 @@ The first response's `[LOADED_DOCS: ...]` prefix must reflect **3 files** (this
 # own-dep-repos: "name: path" — paths are relative to this repo root (.github/..)
 @repo {
   name = "FruitBankHybridApp"
+  prefix = "FBANKAPP"
   type = "product"
   layer = 2
   own-dep-repos = [