refactor!: packages, paths and app IDs under Halkyon Days' names (ADR 0045, step 3)

Learn's folder is apps/halkyon, Todo's apps/myrmex; every package of
ours takes the prefix halkyone_ (halkyone_halkyon_*, halkyone_myrmex_*,
halkyone_train_*, halkyone_meditate_*, halkyone_app, halkyone_base_* and
the other shared ones; halkyon_oidc_* keeps its name, D11). Halkyon and
Myrmex take the app IDs one.halky.halkyon and one.halky.myrmex (D10);
Train and Meditate keep theirs, while every app's Android namespace,
Kotlin package and method channels move to one.halky. The snaps are
halkyon and myrmex (D17), each built in a clone with its recipe in
place of snap/, as Train's and Todo's were.

Serverpod finds a database's migrations by its module's name, which
changed with the packages':
- each server's new, empty migration ("rename") records itself under
  the new names and deletes the rows under the old ones;
- deploy/redeploy.sh copies each database's record to the new name
  before the migrations (carry_module), so the renamed servers find
  their databases migrated; a copy, never a move, so a deploy failing
  before the migration commits leaves the old rows in place;
- Train and Meditate keep their devices' databases: halkyone_app's
  carryMigrationRecord copies their record before the sync engine
  opens them (openPersonDatabase);
- the client migrations' generated moduleName getters, one line each,
  say the new names: Serverpod's client asserts in debug builds that
  every migration names the module, and create-migration never writes
  a migration's files again.

Train's WorkManager work is enqueued under new names, the former ones
cancelled: the work kept names the workers' former classes.

The release tool: an app's tags of its earlier names count as its
history (legacyTagPrefixes), the shared packages' former paths count
for its version, and every snap is built in a clone (atRoot gone).

The databases, Docker images and Compose project keep their names
until step 5.

BREAKING CHANGE: Halkyon (Learn) and Myrmex (Todo) are new apps to
Android and the Snap Store: installs of app.halkyon.learn and
app.halkyon.todo don't update to them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/myrmex/halkyone_myrmex_server/config/production.yaml

@@ -0,0 +1,64 @@
+# Todo's server on learn.halkyon.eu's server, at todo.halkyon.eu (ADR 0033, step 5),
+# behind the instance's Caddy (deploy/compose.todo.yaml): its API and its web server
+# on the one domain, as Learn's and Train's; its database in the instance's PostgreSQL.
+
+# Configuration for the main API server.
+apiServer:
+  port: 8080
+  publicHost: todo.halkyon.eu
+  publicPort: 443
+  publicScheme: https
+
+# No insightsServer, as Learn's: without the block Serverpod doesn't start Insights.
+
+# Configuration for the web server.
+webServer:
+  port: 8082
+  publicHost: todo.halkyon.eu
+  publicPort: 443
+  publicScheme: https
+
+# This is the database setup for your servers. The default for the Google Cloud
+# Engine Terraform configuration is to connect on a private IP address.
+# If you are connecting on a public IP (e.g. on AWS or Google Cloud Run), you
+# connect on the public IP of the database e.g. database.examplepod.com.
+database:
+  host: postgres
+  port: 5432
+  name: halkyon_todo
+  user: halkyon_todo
+  # On the instance's own network, never leaving the server.
+  requireSsl: false
+  #isUnixSocket: true # defaults to false
+  #maxConnectionCount: 10 # Defaults to 10, a negative or null value removes the limit
+
+
+maxRequestSize: 524288 # The maximum size of requests allowed in bytes
+
+# Session logs stay out of the database, for privacy, as Learn's (never re-enable).
+sessionLogs:
+  consoleEnabled: false
+  persistentEnabled: false
+# consoleLogFormat: json # Defaults to "json", options are "text" or "json"
+
+#futureCall:
+#  enabled: true # Defaults to true, set to false to disable scheduling and running future calls
+#  executionEnabled: true # Defaults to true
+#  concurrencyLimit: 1 # Defaults to 1, a negative or null value removes the limit
+#  scanInterval: 5000 # Unit in milliseconds, defaults to 5000
+
+# Recommended when serving web clients: keeps auth tokens in httpOnly
+# cookies. Without this, web tokens live in JavaScript-readable storage,
+# where any XSS can steal them. Web clients opt in with
+# `client.cookieAuth = true`. Requires `allowedOrigins`; browsers from
+# origins not in the list lose cross-origin access, including to public
+# endpoints.
+#authCookie:
+#  sameSite: lax # Defaults to "lax", options are "strict" or "none"
+#  #name: serverpod_auth # Defaults to "serverpod_auth"
+#  #refreshName: serverpod_auth_refresh # Defaults to "<name>_refresh"
+#  #domain: examplepod.com # Defaults to host-only; set to share across subdomains
+#  #path: / # Defaults to "/"
+#  #secure: true # Defaults to true; the cookie is only sent over https
+#allowedOrigins:
+#  - https://app.examplepod.com # The origin serving your Flutter web app