Add the Tazel plugin catalog of ViGet to the API

ViGet opens in stages: first only Progmasoft publishes Tazel plugins, later
every account. This adds the catalog and the server-side publishing for the
first stage; nothing publishes through the API yet.

- ViGet/: the catalog of Tazel plugins (in memory, or in PostgreSQL beside
  the accounts with its own numbered schema steps), the descriptor read from
  the JAR (META-INF/tazel-plugin.properties, with a reader of the Java
  properties format, and the ProjectPlugin service entry), and publishing:
  the publisher must be in ViGet:TazelPublishers (Progmasoft for now) and an
  existing account of that exact name, a version is never replaced, names
  that differ only in letter case are refused, and ViGet needs a
  description, an author and a license. The JAR is kept at
  dslplugins/tazel/<Publisher>/<Name>/<Version>/<Name>-<Version>.jar below
  ViGet:ArtifactRoot.
- Read endpoints under /api/v1/viget/dslplugins/tazel: the list, a plugin,
  and index.json, the index Tazel reads.
- 'viget publish-tazel-plugin <jar>' and 'viget yank-tazel-plugin' run with
  the configuration of the service instead of the service.
- The account store can find an account by name.

The pages, the Nginx routes and the deployment follow.

3 files changed, 26 insertions, 0 deletions

diff --git a/apps/api/Accounts/IAccountStore.cs b/apps/api/Accounts/IAccountStore.cs
index efb7c5b..ccb4c02 100644
--- a/apps/api/Accounts/IAccountStore.cs
+++ b/apps/api/Accounts/IAccountStore.cs
@@ -31,6 +31,13 @@ internal interface IAccountStore
     /// <param name="cancellationToken">Cancels the operation.</param>
     /// <returns>The account, or <see langword="null"/> when it does not exist.</returns>
     ValueTask<AccountRecord?> FindByIdAsync(Guid id, CancellationToken cancellationToken);
+    /// <summary>Finds an account by its normalized name.</summary>
+    /// <param name="normalizedAccountName">
+    /// Upper-case account name, as <see cref="AccountNamePolicy.NormalizeForLookup"/> produces it.
+    /// </param>
+    /// <param name="cancellationToken">Cancels the operation.</param>
+    /// <returns>The account, or <see langword="null"/> when no account has this name.</returns>
+    ValueTask<AccountRecord?> FindByAccountNameAsync(string normalizedAccountName, CancellationToken cancellationToken);
     /// <summary>Stores a session, replacing one with the same token digest.</summary>
     /// <param name="session">The session to store.</param>
     /// <param name="cancellationToken">Cancels the operation.</param>
diff --git a/apps/api/Accounts/InMemoryAccountStore.cs b/apps/api/Accounts/InMemoryAccountStore.cs
index 8606443..2f9af9d 100644
--- a/apps/api/Accounts/InMemoryAccountStore.cs
+++ b/apps/api/Accounts/InMemoryAccountStore.cs
@@ -82,6 +82,19 @@ internal sealed class InMemoryAccountStore : IAccountStore
     }
 
     /// <inheritdoc/>
+    public ValueTask<AccountRecord?> FindByAccountNameAsync(
+        string normalizedAccountName,
+        CancellationToken cancellationToken)
+    {
+        cancellationToken.ThrowIfCancellationRequested();
+        lock (gate)
+        {
+            return ValueTask.FromResult(
+                accountIdsByName.TryGetValue(normalizedAccountName, out Guid id) ? accountsById[id] : null);
+        }
+    }
+
+    /// <inheritdoc/>
     public ValueTask<AccountRecord?> FindByIdAsync(Guid id, CancellationToken cancellationToken)
     {
         cancellationToken.ThrowIfCancellationRequested();
diff --git a/apps/api/Accounts/PostgresAccountStore.cs b/apps/api/Accounts/PostgresAccountStore.cs
index a0e3444..3a3ea82 100644
--- a/apps/api/Accounts/PostgresAccountStore.cs
+++ b/apps/api/Accounts/PostgresAccountStore.cs
@@ -98,6 +98,12 @@ internal sealed class PostgresAccountStore(NpgsqlDataSource dataSource) : IAccou
         FindAccountAsync("google_subject", googleSubject, cancellationToken);
 
     /// <inheritdoc/>
+    public ValueTask<AccountRecord?> FindByAccountNameAsync(
+        string normalizedAccountName,
+        CancellationToken cancellationToken) =>
+        FindAccountAsync("normalized_account_name", normalizedAccountName, cancellationToken);
+
+    /// <inheritdoc/>
     public ValueTask<AccountRecord?> FindByIdAsync(Guid id, CancellationToken cancellationToken) =>
         FindAccountAsync("id", id, cancellationToken);