Add an embedded systems topic

Eight conferences and six journals, curated for the computer-science side of
the field. EDA and circuit-design venues are deliberately excluded — DAC, DATE,
ICCAD and CODES+ISSS are canonical for embedded systems but not for the kind of
work this site tracks — and venues.yaml carries that rationale as a header
comment so the next person doesn't "helpfully" add them back.

Two curation calls worth recording. SenSys, IPSN and IoTDI merged in 2026 into
one conference, the ACM/IEEE International Conference on Embedded Artificial
Intelligence and Sensing Systems; it is tracked under the SenSys acronym, which
is what ICORE and DBLP still use, and IPSN and IoTDI are not listed separately.
RTCSA and ICCPS were dropped — the first is CORE B with no announced 2027
edition, the second carries no CORE rank at all.

Deadlines are all source: manual, verified against the official CFPs. Only EWSN
has a WikiCFP entry for its current edition; every other series there stops at
an edition that has already been held, so the rest are wikicfp_id: false. ECRTS
and LCTES have no announced next edition and sit under missing:, which renders
as TBD. With the stale-deadline handling from 5b06f48 this reads correctly:
only RTAS shows an open deadline, and the rest land in the elapsed-rounds table
rather than advertising passed dates as upcoming.

The topic also exposed three generator bugs that cloud-edge never hit:

_journals_section_body() read scimago_* straight off the venues.yaml entry, so
the journals index showed a dash for every journal without inline values, while
the journal pages resolved the same numbers from rankings/scimago.csv. Both now
share a _journal_ranks() helper, and gen_section_indexes() takes the SCImago
table to feed it. cloud-edge never saw this because all seven of its journals
carry inline values.

The SCImago CSV writes SJR with a decimal comma (0,864). Nothing consumed those
values before, so the loader now normalises them to a dot and CSV-derived
numbers render like the inline ones.

gen_digests() now writes digests/_index.md. Hugo only auto-creates a section
page when the section has a listable page, and a topic with no digests yet
holds nothing but build.list: never stubs, so the Digests nav link 404'd. It
preserves any existing body, leaving cloud-edge's file unchanged.

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

site/data/embedded-systems/deadlines.yaml

@@ -0,0 +1,62 @@
+generated: '2026-08-18T13:26:46Z'
+deadlines:
+  RTSS:
+    source: manual
+    event_dates: Dec 8-11, 2026
+    location: Yokohama, Japan
+    abstract_deadline: May 21, 2026
+    submission_deadline: May 26, 2026
+    camera_ready: Sep 16, 2026
+    cfp_url: https://2026.rtss.org/cfp/
+  RTAS:
+    source: manual
+    event_dates: May 17-20, 2027
+    location: Boulder, CO, USA
+    submission_deadline: Nov 5, 2026
+    notification: Jan 28, 2027
+    camera_ready: Mar 30, 2027
+    cfp_url: https://2027.rtas.org/cfp/
+  SenSys:
+    source: manual
+    location: New York, NY, USA
+    abstract_deadline: May 29, 2026
+    submission_deadline: Jun 5, 2026
+    notification: Aug 31, 2026
+    cfp_url: https://sensys.acm.org/2027/cfp.html
+  EMSOFT:
+    source: manual
+    event_dates: Oct 4-9, 2026
+    location: Barcelona, Spain
+    abstract_deadline: Mar 23, 2026
+    submission_deadline: Mar 30, 2026
+    notification: Jul 17, 2026
+    camera_ready: Aug 17, 2026
+    cfp_url: https://esweek.org/emsoft_cfp/
+  CASES:
+    source: manual
+    event_dates: Oct 4-9, 2026
+    location: Barcelona, Spain
+    abstract_deadline: Mar 23, 2026
+    submission_deadline: Mar 30, 2026
+    notification: Jul 17, 2026
+    camera_ready: Aug 17, 2026
+    cfp_url: https://esweek.org/cases_cfp/
+  EWSN:
+    source: manual
+    event_dates: Sep 16-18, 2026
+    location: Dresden, Germany
+    cfp_url: https://ewsn26.netd.cs.tu-dresden.de/calls/papers
+    cycles:
+    - name: Winter
+      abstract_deadline: Jan 30, 2026
+      submission_deadline: Feb 4, 2026
+      notification: Mar 9, 2026
+      camera_ready: Mar 30, 2026
+    - name: Spring
+      abstract_deadline: Apr 24, 2026
+      submission_deadline: May 3, 2026
+      notification: Jun 15, 2026
+      camera_ready: Jul 6, 2026
+missing:
+- ECRTS
+- LCTES