feat: scaffold terraphim_usage and terraphim_ccusage crates (Refs #187)

- Create terraphim_usage crate with UsageProvider trait, ProviderUsage model,
  MetricLine types, UsageRegistry, SQLite storage layer, output formatters,
  and CLI command definitions
- Create terraphim_ccusage crate with CcusageClient for Claude/Codex token
  tracking via external CLI, caching, and graceful degradation
- Add stub provider implementations for Claude, Kimi, Z.ai, MiniMax, OpenCode Go
- 18 tests passing (12 usage, 6 ccusage)
- Both crates compile as part of workspace

Author: Terraphim CI

Cargo.lock

@@ -2,6 +2,7 @@
 [workspace]
 resolver = "2"
 members = ["crates/*", "terraphim_server", "terraphim_firecracker", "terraphim_ai_nodejs"]
+# Note: terraphim_usage and terraphim_ccusage are new crates in crates/*
 exclude = [
     # Experimental crates
     "crates/terraphim_agent_application",

Cargo.toml

@@ -2,52 +2,52 @@
   "name": "guard_allowlist",
   "data": {
     "git checkout -b ": {
-      "id": 1,
+      "id": "1",
       "nterm": "safe_git_branch_create",
       "url": "Creating a new branch is safe."
     },
     "git checkout --orphan ": {
-      "id": 1,
+      "id": "1",
       "nterm": "safe_git_branch_create",
       "url": "Creating an orphan branch is safe."
     },
     "git restore --staged": {
-      "id": 2,
+      "id": "2",
       "nterm": "safe_git_unstage",
       "url": "Unstaging files is safe; it does not discard working tree changes."
     },
     "git clean -n": {
-      "id": 3,
+      "id": "3",
       "nterm": "safe_git_dry_run",
       "url": "Dry run only shows what would be removed without deleting anything."
     },
     "git clean --dry-run": {
-      "id": 3,
+      "id": "3",
       "nterm": "safe_git_dry_run",
       "url": "Dry run only shows what would be removed without deleting anything."
     },
     "git push --force-with-lease": {
-      "id": 4,
+      "id": "4",
       "nterm": "safe_force_push",
       "url": "Force-with-lease checks that the remote has not been updated before pushing, preventing accidental overwrites."
     },
     "rm -rf /tmp/": {
-      "id": 5,
+      "id": "5",
       "nterm": "safe_tmp_cleanup",
       "url": "Cleaning temporary directories is safe."
     },
     "rm -rf /var/tmp/": {
-      "id": 5,
+      "id": "5",
       "nterm": "safe_tmp_cleanup",
       "url": "Cleaning temporary directories is safe."
     },
     "rm -fr /tmp/": {
-      "id": 5,
+      "id": "5",
       "nterm": "safe_tmp_cleanup",
       "url": "Cleaning temporary directories is safe."
     },
     "rm -fr /var/tmp/": {
-      "id": 5,
+      "id": "5",
       "nterm": "safe_tmp_cleanup",
       "url": "Cleaning temporary directories is safe."
     }