fix(ci): pre-stage forge-CI memory caps for Phase 05e cutover (#108)

Ship the same .kanon-ci.toml that landed in forkwright/kanon as commit
1046068b ("fix(ci,stoa): cap CI concurrency + stop env-leaking
embedding into tests") — caps cargo --jobs / --build-jobs /
--test-threads to 8 so a full-workspace forge CI run stays under
~25GB peak RSS instead of peaking over 100GB and OOM-killing
kanon-server.service.

Why now: this repo is not yet cut over to forge-native PRs, so
.kanon-ci.toml is a no-op until Phase 05e brings forge CI online
for forkwright/akroasis. Staging the caps ahead of cutover avoids
the first post-cutover push OOMing menos (see dianoia inbox note
2026-04-19-kanon-server-oom-cascade.md and kanon#7).

Config is copied verbatim from kanon's version — default Rust gate
(fmt → check → clippy → nextest → lint), concurrency capped at 8
per stage, no akroasis-specific divergence.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Gate-Passed: kanon 0.1.0

Co-authored-by: Cody Kickertz <cody@forkwright.com>

Author: forkwright

.kanon-ci.toml

@@ -0,0 +1,36 @@
+# Forge CI pipeline for forkwright/akroasis.
+#
+# Mirrors the hardcoded default Rust gate (fmt → check → clippy → nextest
+# → lint) but pins per-stage build + test concurrency to 8. Without this
+# cap, cargo defaults to num_cpus (64 on this Threadripper) and parallel
+# rustc + nextest processes peak well over 100GB of RSS — enough to OOM
+# menos when any other fleet work is running. 8 is the budget that keeps
+# a single CI run under ~25GB peak, low enough that serial drains don't
+# OOM even with aletheia.service and the dispatch fleet resident.
+#
+# Keep in sync with `crates/archeion/src/ci_config.rs::default_rust_gate`
+# when the upstream default changes — only the `--jobs` / `--test-threads`
+# flags should differ.
+
+[pipeline]
+stages = ["cargo fmt", "cargo check", "cargo clippy", "cargo nextest", "kanon lint"]
+
+[stages."cargo fmt"]
+cmd = "cargo fmt --all -- --check"
+timeout_secs = 300
+
+[stages."cargo check"]
+cmd = "cargo check --workspace --all-targets --jobs 8"
+timeout_secs = 900
+
+[stages."cargo clippy"]
+cmd = "cargo clippy --workspace --all-targets --jobs 8 -- -D warnings"
+timeout_secs = 900
+
+[stages."cargo nextest"]
+cmd = "cargo nextest run --workspace --build-jobs 8 --test-threads 8"
+timeout_secs = 1800
+
+[stages."kanon lint"]
+cmd = "kanon lint . --summary"
+timeout_secs = 600