feat(learning-harness): absence rows travel with their registration

Eight of the ten vendored access-control rows had no named handler at all,
so every one of them would have scored `missing_context` forever rather
than as a detector miss. After the re-harvest nine are named and the tenth
states its reason.

The handler-context mode now carries the class its framework registers,
multi-line decorators, and commented-out guards -- `#@token_required`
above a ThreatByte handler is the entire bug. Where the registration lives
in another document (connexion's `operationId`, an express router), a
recipe names `context = [...]`, the harvester writes that stanza per side,
and the pair materializes both files at their repository-relative paths so
the entry-point mapper sees the layout the project has. `harvest_recipe`
fetches every blob before the first write and the driver takes `--report`,
so a failed fetch leaves a reviewed excerpt exactly as it was.

Two defects the re-harvest exposed: `.mjs` was not a known suffix, so the
one pair vendored as an ES module had no file target at all; and
`_python_route_access` matched auth words inside decorator prose, reading
`@ns.doc(description='... without proper authorization checks')` as a
guard. Recorded in the hygiene artifact: nine of the ten duplicate groups
sit on both sides of the split, which the repository-level split cannot
see.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG

benchmarks/pairs/agent-vfc/catalog.toml

@@ -881,13 +881,15 @@ fix_policy = "silent"
 provenance = "agent"
 split = "holdout"
 review_tier = "title"
+known_limit = "client_side_caller"
 
 [[pair.expected]]
 cwe = "CWE-862"
 class = "missing authorization"
 path = "components/KubernetesManagement.tsx"
-function = "setErrorMessage"
+function = "loadNamespaces"
 mechanism = "missing_auth_guard"
+family = "access_control"
 evidence = "Fix missing auth header on namespaces API call"
 
 [[pair]]
@@ -1091,7 +1093,7 @@ review_tier = "title"
 cwe = "CWE-16"
 class = "permissive default"
 path = "src/presentation/http/app.ts"
-function = "origin"
+function = "createApplication"
 mechanism = "permissive_default"
 evidence = "fix: allow patch requests through cors"
 
@@ -1214,6 +1216,7 @@ class = "insecure direct object reference"
 path = "backend/app/routers/jobs.py"
 function = "get_job"
 mechanism = "identity_from_request_body"
+family = "access_control"
 evidence = "Fix IDOR on job endpoint: case-bound jobs require case ownership"
 
 [[pair]]
@@ -1243,6 +1246,7 @@ class = "insecure direct object reference"
 path = "backend/app/routers/jobs.py"
 function = "get_job"
 mechanism = "identity_from_request_body"
+family = "access_control"
 evidence = "Fix IDOR on job endpoint: case-bound jobs require case ownership"
 
 [[pair]]
@@ -1266,12 +1270,18 @@ provenance = "agent"
 split = "train"
 review_tier = "title"
 
+[[pair.context]]
+relpath = "services/web/app/src/router.mjs"
+vuln = "overleaf-with-claude-exportscontroller-3980b9/context/vuln/services/web/app/src/router.mjs"
+fixed = "overleaf-with-claude-exportscontroller-3980b9/context/fixed/services/web/app/src/router.mjs"
+
 [[pair.expected]]
 cwe = "CWE-639"
 class = "insecure direct object reference"
 path = "services/web/app/src/Features/Exports/ExportsController.mjs"
 function = "exportProject"
 mechanism = "identity_from_request_body"
+family = "access_control"
 evidence = "Fix IDOR in exports by adding token verification (Issue #31637) (#32883)"
 
 [[pair]]
@@ -1483,6 +1493,7 @@ class = "insecure direct object reference"
 path = "app/api/customers/claims/route.ts"
 function = "PATCH"
 mechanism = "identity_from_request_body"
+family = "access_control"
 evidence = "Brief 62: Fix IDOR on customer_claims PATCH/DELETE (#156)"
 
 [[pair]]
@@ -1512,7 +1523,7 @@ class = "insecure direct object reference"
 path = "app/api/customers/opportunities/route.ts"
 function = "GET"
 mechanism = "identity_from_request_body"
-sink = "path"
+family = "access_control"
 evidence = "Brief 60: Fix IDOR on opportunities GET/PATCH/DELETE (missing company membership checks) (#148)"
 
 [[pair]]
@@ -1749,7 +1760,7 @@ review_tier = "title"
 cwe = "CWE-89"
 class = "sql injection"
 path = "src/utils.ts"
-function = "normalizeDomain"
+function = "getGoogleProvider"
 mechanism = "source_reaches_sink"
 evidence = "Fix SQL injection in search by using parameterized queries (#41)"