docs(spec): presets record themselves in exdata.meta; job-labels backlog item

- no preset field on the server: the client puts preset name + hash into
  the job's exdata JSON under 'meta', passed through uninterpreted; the
  worker skips 'meta' silently; 'preset report' filters jobs client-side
- drop the local submission log idea
- job-labels: independent backlog item (general server-side labels)
- bug-1970: note the dropped REST 'tags' field

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/buglog.json

@@ -18776,7 +18776,7 @@
       "timestamp": "2026-10-12T13:07:37Z",
       "last_seen": "2026-10-12T13:07:37Z",
       "occurrences": 1,
-      "error_message": "apiserver accepts rerunable, requeue/checkpoint/runtime/warning submit options, never sends them\n\n**Observed:** (source reading, 2026-10-12, at 83c6eb80)\n`POST /xce/v1/jobs/create` accepts these `JobSubmitRequest` fields\n(`src/frontend/apiserver/models/jobs.go`, struct at :636) and answers success,\nbut none of them reaches the controller:\n```go\nRerunable          bool   `json:\"rerunable,omitempty\"`\nWarningTimePeriod  int    `json:\"warning_time_period,omitempty\"`\nWarningAction      string `json:\"warning_action,omitempty\"`\nRequeueErrorValues string `json:\"requeue_error_values,omitempty\"`\nRunTimeEstimation  int    `json:\"run_time_estimation,omitempty\"`\nMigThreshold       int    `json:\"mig_threshold,omitempty\"`\nChkpntPeriod       int    `json:\"chkpnt_period,omitempty\"`\nChkpntDir          string `json:\"chkpnt_dir,omitempty\"`\nInitChkpntPeriod   int    `json:\"init_chkpnt_period,omitempty\"`\n```\n- `rerunable`, `warning_time_period`, `warning_action`, `init_chkpnt_period`\n  are not read anywhere outside `models/`.\n- `requeue_error_values`, `run_time_estimation`, `mig_threshold`,\n  `chkpnt_period`, `chkpnt_dir` are copied into `models.JobInfo`\n  (`controllers/jobs.go:1214-1218`, and on restart :1013-1025), but\n  `modelJobToSubmit()` (`backend/convert.go:334`) never reads them, and the\n  controller's `JobSubmitData` / `JobStartInfo` (`src/schema/controller.capnp`\n  :583, :314) have no field for them.\n- None is in `preCheckSubmitOptions()`'s list of refused options\n  (`controllers/jobs.go:1285`), which bug-1936 added for exactly this kind of\n  option (in/out/err files, asked hosts, begin/term time).\n\n**Expected:** each submit option is either passed on to the job or rejected\nwith 400 naming the option, as `preCheckSubmitOptions()` does for the others.\n**Impact:** wrong result: a user asking for automatic requeue on given exit\ncodes, rerun on host failure, periodic checkpoints or a warning signal before\nthe run limit gets a success reply and a job that does none of it.\n**Found by:** review during the `application-profile` brief discussion\n(extra v1 attributes), 2026-10-12.",
+      "error_message": "apiserver accepts rerunable, requeue/checkpoint/runtime/warning submit options, never sends them\n\n**Observed:** (source reading, 2026-10-12, at 83c6eb80)\n`POST /xce/v1/jobs/create` accepts these `JobSubmitRequest` fields\n(`src/frontend/apiserver/models/jobs.go`, struct at :636) and answers success,\nbut none of them reaches the controller:\n```go\nRerunable          bool   `json:\"rerunable,omitempty\"`\nWarningTimePeriod  int    `json:\"warning_time_period,omitempty\"`\nWarningAction      string `json:\"warning_action,omitempty\"`\nRequeueErrorValues string `json:\"requeue_error_values,omitempty\"`\nRunTimeEstimation  int    `json:\"run_time_estimation,omitempty\"`\nMigThreshold       int    `json:\"mig_threshold,omitempty\"`\nChkpntPeriod       int    `json:\"chkpnt_period,omitempty\"`\nChkpntDir          string `json:\"chkpnt_dir,omitempty\"`\nInitChkpntPeriod   int    `json:\"init_chkpnt_period,omitempty\"`\n```\n- `rerunable`, `warning_time_period`, `warning_action`, `init_chkpnt_period`\n  are not read anywhere outside `models/`.\n- `requeue_error_values`, `run_time_estimation`, `mig_threshold`,\n  `chkpnt_period`, `chkpnt_dir` are copied into `models.JobInfo`\n  (`controllers/jobs.go:1214-1218`, and on restart :1013-1025), but\n  `modelJobToSubmit()` (`backend/convert.go:334`) never reads them, and the\n  controller's `JobSubmitData` / `JobStartInfo` (`src/schema/controller.capnp`\n  :583, :314) have no field for them.\n- None is in `preCheckSubmitOptions()`'s list of refused options\n  (`controllers/jobs.go:1285`), which bug-1936 added for exactly this kind of\n  option (in/out/err files, asked hosts, begin/term time).\n\n**Expected:** each submit option is either passed on to the job or rejected\nwith 400 naming the option, as `preCheckSubmitOptions()` does for the others.\n**Impact:** wrong result: a user asking for automatic requeue on given exit\ncodes, rerun on host failure, periodic checkpoints or a warning signal before\nthe run limit gets a success reply and a job that does none of it.\n**Found by:** review during the `application-profile` brief discussion\n(extra v1 attributes), 2026-10-12.\n\nUPDATE (2026-10-12): The REST submit model's `Tags []string` (`json:\"tags\"`, models/jobs.go JobSubmitRequest) is also accepted and dropped: nothing outside models/ reads it, and it is not in preCheckSubmitOptions(). Roadmap item job-labels would reuse or replace it.",
       "file": "src/frontend/apiserver/controllers/jobs.go, src/frontend/apiserver/backend/convert.go, src/frontend/apiserver/models/jobs.go",
       "root_cause": "TODO: required for fixed/partial",
       "fix": "TODO: required for fixed/partial\n\nVerification:\n- Test: TODO: name + file; RED before the fix, GREEN after\n- Suites: TODO: suite results and build profile\n- Live: TODO: soak/deploy run, or n/a and why",

.wolf/bugs/bug-1970.md

@@ -51,6 +51,8 @@ the run limit gets a success reply and a job that does none of it.
 **Found by:** review during the `application-profile` brief discussion
 (extra v1 attributes), 2026-10-12.
 
+UPDATE (2026-10-12): The REST submit model's `Tags []string` (`json:"tags"`, models/jobs.go JobSubmitRequest) is also accepted and dropped: nothing outside models/ reads it, and it is not in preCheckSubmitOptions(). Roadmap item job-labels would reuse or replace it.
+
 ## Environment
 - OS: no /etc/os-release; Docker container; NixOS kernel; kernel Linux 6.18.33 x86_64
 - libc: n/a: found by source reading, no binary run (host ldd reports glibc 2.40)