docs: refresh wiki for /healthz, JSON logs, deploy-prep status

Home.md

@@ -13,7 +13,7 @@ real spending on the applied side.
 * [DevelopmentGuide](DevelopmentGuide) — prerequisites, setup, run, test,
   project layout, conventions, throwaway-DB pattern
 * [Operations](Operations) — backup script, restore, DB safety rule,
-  alembic hook
+  alembic hook, /healthz endpoint, structured JSON logs
 * [Roadmap](Roadmap) — shipped features and what's deferred
 
 ## At a glance
@@ -28,6 +28,10 @@ real spending on the applied side.
   its backing ledger of transactions (postings) and add more. Applied
   is always `sum(postings.amount)`, never typed directly. Rows carry
   deviation tags when edited or added post-snapshot.
+* `/healthz` — unauthenticated health probe. Returns 200 `{"status":"ok"}`
+  when the DB is reachable, 503 `{"status":"error","detail":<exc-class>}`
+  otherwise. Targets the Docker `HEALTHCHECK` and the platform's
+  container-down alert.
 * **Zero Amount header** on both pages. Green when every dollar is
   assigned, amber when unassigned income remains, red when over-budget.
   The logo anchors the left of the hero; Applied / Planned flank the big
@@ -72,8 +76,21 @@ Shipped: initial scaffold, monthly snapshot with deviation tags, database
 backup script with alembic auto-hook, zero-amount header, section groups
 with collapsible headers, sinking funds section, per-entry notes, month
 lifecycle with the balance gate, UI redesign in Barlow Condensed + logo,
-backing transaction ledger with `applied` derived from postings. See the
-[Roadmap](Roadmap) for what is next.
+backing transaction ledger with `applied` derived from postings,
+budget-side inline edit of entry name and amount, `/healthz` endpoint,
+structured JSON logs on stdout with five seed application events for
+Loki. See the [Roadmap](Roadmap) for what is next.
+
+## Deploy
+
+Production is home-ctr-onyx (homelab). The deploy contract with the
+homelab platform is documented on the platform wiki as
+[PlatformContractQuartermaster](https://forgejo.labbity.unbiasedgeek.com/homelab/homelab-IaC/wiki/PlatformContractQuartermaster).
+Platform-side provisioning (DNS for `quartermaster.unbiasedgeek.com`,
+Traefik basic-auth + rate-limit middlewares, `/mnt/quartermaster/` bind
+mount with nightly restic) is complete. Container side (Dockerfile,
+`compose.yml`, Forgejo Actions workflow) is tracked under open issues
+and will land in a follow-up session.
 
 ## Code