retrofit op compact

Drop the oplog's traces (tombstoned lines and replaces= entries) to
exactly one bound, rewiring each prev= to its effective value; the render
every verb reads is unchanged.

  --frontier <file>  a trace drops only when <file> holds the same trace
  --unshared <file>  a trace drops only when <file> holds no line,
                     tombstone or replacement of its opid
  --all              every trace outside sealed ranges drops

A sealed range compacts only when --seal <opid> names its Seal, to the
bound, without resealing. A file holding no trace to drop is not written.

Usage:
  retrofit op compact [flags]

Flags:
      --all               drop every trace outside sealed ranges (the flag is the attestation no open branch holds them)
      --frontier string   drop a trace only when this file holds the same trace
  -h, --help              help for compact
      --help-all          show extended help (vocabulary, semantics, caveats)
      --seal strings      also compact the sealed range of each named live Seal, to the bound
      --unshared string   drop a trace only when this file holds no line, tombstone or replacement of its opid

Global Flags:
      --as string        output mode: text | json (default "text")
  -C, --chdir string     treat <dir> as the working directory for the entire run
      --config string    retrofit.toml path (overrides discovery; also accepts $RETROFIT_CONFIG)
  -f, --file string      oplog file path; selects a registered [[schema]] path (overrides discovery)
      --no-consolidate   render every advisory occurrence instead of collapsing repeats
  -q, --quiet count      suppress the advisory tier on stderr; stack (-qq) to drop it whole (errors and results still print)
      --schema <name>    registered schema <name> (resolves via the chain when omitted)
  -v, --verbose          reveal info-tier advisories on stderr

Docs: https://docs.retrofit.sh/current/commands/retrofit-op-compact/