Fix wt-metadata-refresh failing on .bazelproject with commented directories

[cshtdd]

Why

wt-metadata-refresh always fails when the .bazelproject file contains commented-out directories (e.g. # ca, # deposits).

What

• Fix awk regex that failed to filter commented lines — [^#] matched the second space character instead of the #, leaking invalid paths like //# ca/... into the bazel query
• Use --keep_going and || true so directories without BUILD files (e.g. .github, .hooks) don't kill the entire query via pipefail

Risk Assessment

Low — only affects the metadata refresh script, no production services.

Testing

Discovery: Running wt-metadata-refresh failed with Bazel query failed for base (exit code: 2). The stderr was suppressed (2>/dev/null), so the root cause wasn't visible.

Root cause analysis:

1. Ran the awk parser in isolation and found commented lines like # ca were passing through:

   printf '  # ca\n' | awk '/^[[:space:]]+[^#]/ { print "MATCH" }'
   # Output: MATCH
   

   The regex [[:space:]]+ only consumed one space, then [^#] matched the second space — not the #.

2. Confirmed the generated query included invalid paths like //# ca/..., causing bazel query to fail entirely.

3. After fixing the awk regex, bazel query still failed because .github and .hooks have no BUILD files:

   bazel query "kind('.*', //.github/... + //account-status/...)" --output=label
   # ERROR: no targets found beneath '.github'  (exit code 7)
   

Validation: After both fixes, ran wt-metadata-refresh successfully — refreshed 14,949 targets and re-exported 53 metadata directories to the vault.

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