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/content/embedded-systems/venues/conferences/_index.md

@@ -0,0 +1,16 @@
+---
+title: Conferences
+description: 8 tracked conferences
+draft: false
+---
+
+| Conference | Full name | ICORE | Domains | Abstract | Paper deadline | Notification | Event | Location | Digests |
+|---|---|---|---|---|---|---|---|---|---|
+| [RTSS](/embedded-systems/venues/conferences/rtss/) | IEEE Real-Time Systems Symposium | **A\*** | `embedded-systems`, `real-time-systems`, `scheduling` | May 21, 2026 | May 26, 2026 |  | Dec 8-11, 2026 | Yokohama, Japan | — |
+| [SenSys](/embedded-systems/venues/conferences/sensys/) | ACM/IEEE International Conference on Embedded Artificial Intelligence and Sensing Systems | **A\*** | `embedded-systems`, `sensor-networks`, `embedded-ai`, `iot` | May 29, 2026 | Jun 5, 2026 | Aug 31, 2026 | — | New York, NY, USA | — |
+| [RTAS](/embedded-systems/venues/conferences/rtas/) | IEEE Real-Time and Embedded Technology and Applications Symposium | **A** | `embedded-systems`, `real-time-systems`, `cyber-physical-systems` |  | Nov 5, 2026 | Jan 28, 2027 | May 17-20, 2027 | Boulder, CO, USA | — |
+| [ECRTS](/embedded-systems/venues/conferences/ecrts/) | Euromicro Conference on Real-Time Systems | **B** | `embedded-systems`, `real-time-systems`, `scheduling` |  | TBD |  | — |  | — |
+| [EWSN](/embedded-systems/venues/conferences/ewsn/) | International Conference on Embedded Wireless Systems and Networks | **B** | `embedded-systems`, `sensor-networks`, `wireless-networks`, `iot` | Apr 24, 2026 | May 3, 2026 (Spring) | Jun 15, 2026 | Sep 16-18, 2026 | Dresden, Germany | — |
+| [LCTES](/embedded-systems/venues/conferences/lctes/) | ACM SIGPLAN/SIGBED International Conference on Languages, Compilers, and Tools for Embedded Systems | **B** | `embedded-systems`, `compilers`, `programming-languages`, `embedded-software` |  | TBD |  | — |  | — |
+| [CASES](/embedded-systems/venues/conferences/cases/) | International Conference on Compilers, Architecture, and Synthesis for Embedded Systems | **Journal published** | `embedded-systems`, `compilers`, `embedded-software` | Mar 23, 2026 | Mar 30, 2026 | Jul 17, 2026 | Oct 4-9, 2026 | Barcelona, Spain | — |
+| [EMSOFT](/embedded-systems/venues/conferences/emsoft/) | ACM SIGBED International Conference on Embedded Software | **Journal published** | `embedded-systems`, `embedded-software`, `real-time-systems` | Mar 23, 2026 | Mar 30, 2026 | Jul 17, 2026 | Oct 4-9, 2026 | Barcelona, Spain | — |