GOAL: recover elevation for individual grid cells that the row sweeps dropped at raster seams.

WORKDIR (bash = mcp__workspace__bash): /sessions/upbeat-quirky-clarke/mnt/outputs/sfmap/

Your work list is lines of /sessions/upbeat-quirky-clarke/mnt/outputs/sfmap/recov_urls.txt.
Each line is:  <cellid>,<cellid> <url>
The url is a MULTIPOINT getSamples query with the points in exactly that cellid order.

For each assigned LINE NUMBER:
 1. Read the line:  sed -n '<N>p' /sessions/upbeat-quirky-clarke/mnt/outputs/sfmap/recov_urls.txt
 2. Fetch the url with mcp__workspace__web_fetch ONLY. curl/wget/python-requests are PROHIBITED.
    If the body comes back EMPTY (just the url echo, no JSON), retry the same url once; if still
    empty, move the "&f=json" parameter to a different position in the query string to bust the
    cache and retry. NEVER alter the geometry, pixelSize, or geometryType values.
 3. The JSON samples carry "locationId": 0 maps to the FIRST cellid on the line, 1 to the SECOND.
    Samples may come back out of order - use locationId, not array position.
    Sanity check: every sample must show "resolution":1. If any shows a different resolution,
    do not save it; report that line as BAD RESOLUTION instead.
 4. Save with (value rounded to 1 decimal, keep the sign):
      cd /sessions/upbeat-quirky-clarke/mnt/outputs/sfmap/ && python3 save_recov.py "<cellid>:<val> <cellid>:<val>"
    If a locationId is absent from the response, just omit that cell and note it.
    If a value's magnitude is absurd (abs > 10000, NoData), write -9999 for it.

DO NOT create any other files or write .md reports.
FINAL ANSWER: one line per work-list line -> "line N: <cellid>=<val> <cellid>=<val>" plus any
cell that was absent or bad. Nothing else.