fix(ledger): one-line CSS rules fingerprint their own declarations; the proposer writes uses edges for judged rows too (#2872, #2870)

First deploy of v26.08.21.1 showed two gaps:
- Every one-line CSS rule followed by a blank line hashed to sha1("") — the
  declarations live on the selector line, which the #2872 "declarations only"
  fingerprint dropped — so 68 unrelated one-liners across 17 files read as
  one body-identical copy at the top of the derive readout. The selector
  line's tail after "{" is now part of the hash; an all-blank remainder falls
  back to the whole block.
- The proposer only examined unjudged rows, so consumers that were already
  classified (auth.create_invitation → hash_token) never got a uses edge: 3
  edges for hash_token after the first refresh. Judged rows are now scanned
  for references (once per body), no proposal is made on them.
- 0084 migration docstring reworded: "function that …" at a line start parsed
  as a definition (extractor false positive).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/scribe/services/coverage.py

@@ -191,7 +191,19 @@ def extract_definitions(text: str) -> list[Definition]:
         # same rule under another name?" — .closed-msg / .error-block /
         # .success-msg with identical bodies are one dup group, not three
         # lonely rows. Sym blocks keep their signature line in the hash.
-        hashed = block[1:] if kind == "css" and len(block) > 1 else block
+        if kind == "css":
+            # One-line rules (`.x { color: red; }`) carry their declarations on
+            # the selector line itself; a block that is only the selector plus
+            # trailing blanks must not hash to the empty string (which grouped
+            # 68 unrelated one-liners as one "copy" on first deploy, #2872).
+            first = lines[i]
+            brace = first.find("{")
+            head = [first[brace + 1:]] if brace >= 0 and first[brace + 1:].strip() else []
+            hashed = head + block[1:]
+            if not any(x.strip() for x in hashed):
+                hashed = block
+        else:
+            hashed = block
         out.append(Definition(
             kind, name, lines[i].strip()[:_SIGNATURE_CAP], _block_sha(hashed),
             "\n".join(block), i,

src/scribe/services/shape_ledger.py

@@ -1225,7 +1225,6 @@ async def propose_for_repo(
                 select(CodeShape).where(
                     CodeShape.project_id == project_id,
                     CodeShape.repo_key == repo_key,
-                    CodeShape.status.in_(_MECHANICAL_TODO),
                     CodeShape.vanished_at.is_(None),
                 )
             )
@@ -1239,6 +1238,18 @@ async def propose_for_repo(
             examined_as = f"{body_sha}@{_PROPOSER_VERSION}"
             if row.proposed_at is not None and row.proposed_sha == examined_as:
                 continue
+            if row.status not in _MECHANICAL_TODO:
+                # A judged row gets no proposal — but its uses edges (#2870)
+                # are a fact about the body, judged or not: the consumer map
+                # of a canon must include the call sites someone already
+                # classified. Mark it examined so the scan runs once per body.
+                used = reference_canons(row.kind, row.path, row.symbol, body, canons)
+                if used:
+                    await record_uses(session, row, used, basis="reference",
+                                      evidence="proposer: body names the canon's symbol")
+                row.proposed_at = now
+                row.proposed_sha = examined_as
+                continue
             examined += 1
             group = row.proposal_group  # derive grouping is reassigned below
             hit = match_canon(