Celenium URL in BlockResponse doc + Unreleased changelog: /blocks/ → /block/

CHANGELOG.md

@@ -8,7 +8,7 @@ Format follows [Keep a Changelog 1.1.0](https://keepachangelog.com/en/1.1.0/). I
 
 ### Added
 
-- `slots.da_block_height` column (migration `20260518000002_slots_da_block_height.sql`) + matching `da_block_height: Option<u64>` field on `BlockResponse`. The indexer's `extract_slot_first_batch_facts` (renamed from `extract_slot_proposer` to reflect that it now pulls two related fields from the same first-batch fetch) reads `receipt.da_block_height` from chain v0.2.3+ batch JSON and writes the BIGINT through the existing slot upsert. COALESCE-preserve semantics mirror the `proposer` column: a re-poll that can't reach batches doesn't blank a known value. `null` on slots ingested before chain v0.2.3 (no backfill yet) and on slots whose first-batch fetch fails. Powers the explorer's "View on Celenium" deep-link per `ligate-io/ligate-chain#355` (`https://mocha.celenium.io/blocks/{da_block_height}`).
+- `slots.da_block_height` column (migration `20260518000002_slots_da_block_height.sql`) + matching `da_block_height: Option<u64>` field on `BlockResponse`. The indexer's `extract_slot_first_batch_facts` (renamed from `extract_slot_proposer` to reflect that it now pulls two related fields from the same first-batch fetch) reads `receipt.da_block_height` from chain v0.2.3+ batch JSON and writes the BIGINT through the existing slot upsert. COALESCE-preserve semantics mirror the `proposer` column: a re-poll that can't reach batches doesn't blank a known value. `null` on slots ingested before chain v0.2.3 (no backfill yet) and on slots whose first-batch fetch fails. Powers the explorer's "View on Celenium" deep-link per `ligate-io/ligate-chain#355` (`https://mocha.celenium.io/block/{da_block_height}` — singular `/block/`; `/blocks` is the list page).
 - `GET /v1/stats/drips-daily?days=N` endpoint. Returns daily faucet-drip counts broken down by source: `web` (chain-side count of `bank.transfer` txs from the faucet sender, read from the indexer's `transactions` table) and `bot` (api-side count from `bot_drips`). Powers the cost dashboard's drips-per-day panel without Grafana needing to aggregate two heterogeneous sources client-side. Same `DailyPoint`-style shape as `/v1/stats/attestations-daily`. 30s cached, capped at 90 days of history.
 - `POST /v1/drip-bot` endpoint for the Discord faucet bot. Header-gated via `X-Bot-Secret`; uses the same hot-key signer as `POST /v1/drip` so there's a single nonce stream and no inter-endpoint coordination. Tier-aware amounts validated server-side (100 / 250 / 500 / 1000 LGT for newcomer / regular / veteran / elder, by Discord server tenure). 5-day cooldown, applied independently to (a) per-address and (b) per-Discord-user counters; both must clear. Endpoint disabled (returns 503) if `FAUCET_BOT_SECRET` is unset, so safe to merge before the bot is deployed.
 - `bot_drips` Postgres table for durable cooldown state (`migrations/20260518000001_bot_drips.sql`). Two B-tree indexes on `(address, dripped_at DESC)` and `(discord_user_id, dripped_at DESC)` so each cooldown check is a single index seek. Cooldowns persisted to Postgres (not in-memory like the web faucet's `RateLimiter`) because Railway restarts during a 5-day window would otherwise lose multi-day cooldowns.

crates/api/src/responses.rs

@@ -129,7 +129,8 @@ pub struct BlockResponse {
     /// `receipt.da_block_height` field (added in chain v0.2.3 per
     /// ligate-io/ligate-chain#355). Powers the explorer's
     /// "View on Celenium" deep-link: the per-block UI builds
-    /// `https://mocha.celenium.io/blocks/{da_block_height}`.
+    /// `https://mocha.celenium.io/block/{da_block_height}` (singular
+    /// `/block/`; `/blocks` is the list page and 404s on detail).
     ///
     /// `null` for blocks indexed before this field shipped (chain
     /// v0.2.2 and earlier did not emit it; no backfill yet) and for