Link provenance record and clarify rows

README.md

@@ -23,8 +23,12 @@ configs:
 # GitHub Stars in Context
 
 A dataset of repository popularity across GitHub accounts. It links
-**3,671,497 GitHub user accounts** to the **53,990,808 public, non-fork
-repositories** they own, with each repository's star count.
+**3,671,497 GitHub user accounts** to **53,990,808 rows of public, non-fork
+repositories** they own, with each repository's star count. A row is one
+repository under one account.
+
+Provenance, checks and known limits are documented in
+[PROVENANCE.md](https://github.com/NaiveNeuron/github-stars-in-context/blob/main/PROVENANCE.md).
 
 Most GitHub datasets describe repositories one by one. This one keeps the
 ownership context: every stored repository of an account, including those with
@@ -93,7 +97,9 @@ hf download NaiveNeuron/github-stars-in-context --repo-type dataset --local-dir
   and `unknown` for 6. The classes are derived from the collector's logic.
   They are not an independent check against GitHub.
 - **Missing follower counts.** `profile_available` is false for 1,151,092
-  accounts whose profile request failed. Their `followers_count` is NULL.
+  accounts whose profile fields were not obtained. Their `followers_count` is
+  NULL. In a sample of 300 such accounts checked in November 2026, 298 still
+  existed and 296 had followers, so the stored zeros are not real counts.
   The raw stored value is kept in `followers_count_raw` and must not be read
   as zero followers.
 - **One snapshot.** Star counts are as of retrieval. Per-request times were