The AppView's handle_sync worker consulted the public PLC directory
and the did:web: HTTPS resolver only. DIDs hosted on the local PDS
(notably did🔑 users and any other operator-hosted method)
weren't reachable without an external round trip, and unresolvable
DIDs (did🔑 not on this PDS, did:foo: anything) blocked the
100-row batch forever because did🔑 sorts lexicographically
before did:plc: / did:web:.
This commit adds:
* `PdsHandleResolver` (at-identity) — POSTs the DID as the
`handle` field to the PDS's resolveHandle XRPC method. The PDS
now recognises a `did:` prefix and does a PK lookup on
`users.did`, returning `{did, handle}`. The resolver reads
the `handle` field, so the AppView finally gets a real local
handle for did🔑 users without ever dialing plc.directory.
* A 2 s timeout per request (was 10 s) and `DISPATCH_CONCURRENCY =
8` so the worker caps a 100-DID batch at ~2 s with parallel
dispatch instead of the ~17 min worst case the old serial + 10 s
setup allowed.
* A new `posts.handle_sync_attempted_at` column (migration 0006)
and `mark_attempted()` helper. The SELECT filter excludes rows
attempted within the last hour, so an unresolvable DID dominates
at most one batch before the worker advances. Cleared on success.
* `PDS_INTERNAL_URL` config so the AppView can reach the PDS via
a cluster-internal hostname when the public URL isn't routable
from inside the cluster.
Tests:
* `crates/at-identity/src/pds_handle.rs` — 4 unit tests against a
stub HTTP server (200/404/5xx/missing-did-field).
* Existing handle_sync integration tests updated to wire in the
new `pds_resolver` field.
The handle-sync worker picks the next BATCH_SIZE=100 distinct
DIDs with 'handle = \"\"' via 'ORDER BY did LIMIT 100'. But
'alphabetically' (which is what ORDER BY on a text column
produces) puts 'did🔑' before 'did:plc:' before 'did:web:'.
The 'dispatch' function returns 'Ok(None)' for 'did🔑'
(no resolver exists), counts that as 'skipped', and exits the
batch. Result: every pass processes the same ~3700 'did🔑'
rows first and never reaches any resolvable 'did:plc:' DID.
Fix at the SQL layer: 'WHERE did LIKE \"'did:plc:%\"' OR did
LIKE \"'did:web:%\"' \"'\") so every batch is real work. After
the first run on a fresh start, 'resolved=254 failed=0 skipped=0'
instead of 'resolved=0 failed=0 skipped=100'.
tomdebone