docs(6205): last id-less stories in services — a ported-from project name and two "this milestone" references

backup_s3 says what its signing is checked against instead of which of the
operator's projects it was ported from; rulebooks and shape_check state what
the code is for rather than which milestone it belonged to.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/scribe/services/backup_s3.py

@@ -1,8 +1,8 @@
 """A small S3 client for sending backups: AWS Signature Version 4 over httpx,
 path-style addressing (endpoint/bucket/key), and the two calls a backup needs.
 
-Ported from FabledSteward's `steward/backup/s3.py`, which is tested against
+The signing is checked against AWS's published SigV4 examples in
-the same AWS examples as tests/test_services_backup_s3.py.
+tests/test_services_backup_s3.py.
 
 Scribe puts and lists; it never deletes. The bucket keeps the history and
 thins it on its own policy, so a key that may only add objects is enough —

src/scribe/services/rulebooks.py

@@ -324,8 +324,8 @@ def rule_brief(rule: Rule, **extra) -> dict:
     of payload for a precision nobody reads.
 
     `why` and `how_to_apply` are deliberately NOT here — they are the depth a
-    caller gets from get_rule, and putting them in every listing is the bloat
+    caller gets from get_rule, and putting them in every listing would bloat
-    this milestone is about.
+    every payload that lists rules.
     """
     out = {
         "id": rule.id,
@@ -1583,11 +1583,10 @@ async def rules_due_for_verification(
 ) -> list[Rule]:
     """Rules that carry a check, oldest verification first, never-checked top.
 
-    THE QUERY THIS MILESTONE EXISTS FOR. `verify_with` and `expires_when` are
+    `verify_with` and `expires_when` are storage; this is what turns them into
-    storage; this is what turns them into something that gets acted on. The
+    something that gets acted on. Without it, finding broken rules takes an
-    307 audit cost a session and found four broken rules by luck — this makes
+    audit and luck — this makes the same question a list, and staleness
-    the same question a list, and staleness measurable by age instead of
+    measurable by age instead of discoverable by accident.
-    discoverable by accident.
 
     Ordered `verified_at` ASC NULLS FIRST: never-checked outranks
     checked-long-ago, because a rule nobody has ever confirmed is a claim

src/scribe/services/shape_check.py

@@ -161,8 +161,8 @@ def summarise(outcomes: list[str]) -> dict:
     `checked` is turns the question was put to (a first stop that wrote
     something): passed + blocked. `asked` is the blocked ones. `left` is
     asks the agent walked past — the stop after a block that still had
-    unjudged shapes. That last number is the slip the milestone exists to
+    unjudged shapes. That last number is the slip this check exists to make
-    make visible."""
+    visible."""
     checked = sum(1 for o in outcomes if o in ("passed", "blocked"))
     asked = sum(1 for o in outcomes if o == "blocked")
     left = sum(1 for o in outcomes if o == "left_after_block")