Seed plans fill every uncovered gap, with priorities; cheaper ingest and file storing

- seed:plan plans every part of a group's history no range covers (it
  started below the lowest known range and left a.b.ath's 13 most recent
  months out); seed_ranges.priority orders leases (seed:plan --priority).
- binaries.part_count, kept by the parts insert in the same statement:
  claimCompleted compares it instead of counting parts every batch.
- file_keys: 64-bit hashes of all file keys; FileStore.insert asks it
  before probing every files partition.
- worker:file stores 100 completed binaries per job with set-based queries.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

database/schema.ts

@@ -33,7 +33,7 @@ export class AuthAccessTokenSchema extends BaseModel {
 }
 
 export class BinarySchema extends BaseModel {
-  static $columns = ['completedAt', 'conflictedAt', 'fileId', 'fileKey', 'firstSeenAt', 'groups', 'id', 'lastSeenAt', 'md516K', 'name', 'parentBinaryId', 'postedAt', 'poster', 'realName', 'releaseId', 'size', 'splitAt', 'subject', 'totalParts'] as const
+  static $columns = ['completedAt', 'conflictedAt', 'fileId', 'fileKey', 'firstSeenAt', 'groups', 'id', 'lastSeenAt', 'md516K', 'name', 'parentBinaryId', 'partCount', 'postedAt', 'poster', 'realName', 'releaseId', 'size', 'splitAt', 'subject', 'totalParts'] as const
   $columns = BinarySchema.$columns
   @column.dateTime()
   declare completedAt: DateTime | null
@@ -57,6 +57,8 @@ export class BinarySchema extends BaseModel {
   declare name: string
   @column()
   declare parentBinaryId: bigint | number | null
+  @column()
+  declare partCount: number | null
   @column.dateTime()
   declare postedAt: DateTime | null
   @column()
@@ -172,6 +174,13 @@ export class FetchRangeSchema extends BaseModel {
   declare updatedAt: DateTime
 }
 
+export class FileKeySchema extends BaseModel {
+  static $columns = ['keyHash'] as const
+  $columns = FileKeySchema.$columns
+  @column({ isPrimary: true })
+  declare keyHash: bigint | number
+}
+
 export class FileSchema extends BaseModel {
   static $columns = ['archive', 'contentType', 'createdAt', 'date', 'fileKey', 'filename', 'firstMessageId', 'groups', 'id', 'parts', 'poster', 'realName', 'releaseId', 'segments', 'size', 'updatedAt'] as const
   $columns = FileSchema.$columns
@@ -486,7 +495,7 @@ export class SeedNodeSchema extends BaseModel {
 }
 
 export class SeedRangeSchema extends BaseModel {
-  static $columns = ['attempts', 'createdAt', 'doneAt', 'endId', 'error', 'files', 'fragments', 'groupName', 'headers', 'heartbeatAt', 'id', 'leasedAt', 'nextId', 'nodeId', 'startId', 'status'] as const
+  static $columns = ['attempts', 'createdAt', 'doneAt', 'endId', 'error', 'files', 'fragments', 'groupName', 'headers', 'heartbeatAt', 'id', 'leasedAt', 'nextId', 'nodeId', 'priority', 'startId', 'status'] as const
   $columns = SeedRangeSchema.$columns
   @column()
   declare attempts: number
@@ -517,6 +526,8 @@ export class SeedRangeSchema extends BaseModel {
   @column()
   declare nodeId: number | null
   @column()
+  declare priority: number
+  @column()
   declare startId: bigint | number
   @column()
   declare status: string