fix(sbom): resolve repo path from hub host_paths when --repo-path omitted

Previously defaulted to CWD ("."), causing ingest to silently scan the
state-hub directory instead of the target repo when called without
--repo-path. Now queries GET /repos/{slug}/ for host_paths[hostname]
and exits with a clear error if neither flag nor hub lookup succeeds.

Also deleted the incorrect SBOM snapshot for repo-registry (420 entries
that were actually state-hub packages).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/ingest_sbom.py

@@ -22,6 +22,7 @@ import argparse
 import json
 import os
 import re
+import socket
 import sys
 import urllib.error
 import urllib.request
@@ -505,6 +506,23 @@ def post_ingest(api_base: str, repo_slug: str, entries: list[dict]) -> dict:
 # Entry point
 # ---------------------------------------------------------------------------
 
+def _resolve_repo_path_from_hub(api_base: str, repo_slug: str) -> Path | None:
+    """Query the hub for this host's registered path for repo_slug."""
+    try:
+        url = f"{api_base}/repos/{repo_slug}/"
+        with urllib.request.urlopen(url) as resp:
+            data = json.loads(resp.read())
+        hostname = socket.gethostname()
+        host_paths = data.get("host_paths", {})
+        if hostname in host_paths:
+            p = Path(host_paths[hostname])
+            if p.exists():
+                return p
+    except Exception:
+        pass
+    return None
+
+
 def main() -> None:
     parser = argparse.ArgumentParser(
         description="Ingest a repo's lockfiles and tool manifests into the State Hub SBOM store."
@@ -512,14 +530,28 @@ def main() -> None:
     parser.add_argument("--repo", required=True, help="Managed-repo slug (e.g. 'the-custodian')")
     parser.add_argument("--lockfile", action="append", dest="lockfiles",
                         metavar="PATH", help="Path to a specific lockfile (repeatable)")
-    parser.add_argument("--repo-path", default=".", help="Repo root for auto-detection/scan (default: cwd)")
+    parser.add_argument("--repo-path", default=None,
+                        help="Repo root for auto-detection/scan (default: resolved from hub host_paths)")
     parser.add_argument("--scan", action="store_true",
                         help="Recursively find ALL lockfiles under --repo-path (deprecated; now default behaviour)")
     parser.add_argument("--api-base", default=API_BASE, help="State Hub API base URL")
     parser.add_argument("--dry-run", action="store_true", help="Parse only — do not submit")
     args = parser.parse_args()
 
-    repo_root = Path(args.repo_path).resolve()
+    if args.repo_path is not None:
+        repo_root = Path(args.repo_path).resolve()
+    else:
+        resolved = _resolve_repo_path_from_hub(args.api_base, args.repo)
+        if resolved:
+            repo_root = resolved
+            print(f"  Repo path resolved from hub: {repo_root}")
+        else:
+            print(
+                f"ERROR: --repo-path not given and hub lookup failed for '{args.repo}'.\n"
+                f"  Register the repo first or pass --repo-path explicitly.",
+                file=sys.stderr,
+            )
+            sys.exit(1)
     all_entries: list[dict] = []
 
     if args.lockfiles: