Build definitions with onPush/atTimes replace branch-owned schedules

ADR 0007: the YAML builds section (next to the reserved maxConcurrent
key) defines named builds (jobs) with onPush/atTimes triggers, branch
selectors (name globs, activeWithin age filter), and build-setting
overrides applied last over the merged branch config. The implicit
default build (onPush over all branches) preserves the previous
behavior; the section is pinned against the worktree layer.

Results record the job name; restart, retry, and startup recovery
re-run by it, resolving settings from the current config. A non-default
build records under the <branch>@<build> pool with its own row,
retention count, and permanent latest-green link.

branches.*.autoBuild stays as a deprecated alias (plain times only);
the unreleased-in-practice v0.9.13 per-slot buildCommand/name syntax is
removed again.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/main/kotlin/de/hoennig/gittally/server/BuildsApiController.kt

@@ -5,6 +5,7 @@ import de.hoennig.gittally.build.BuildExecutor
 import de.hoennig.gittally.build.BuildResult
 import de.hoennig.gittally.build.BuildResultRepository
 import de.hoennig.gittally.build.BuildStatus
+import de.hoennig.gittally.config.BuildDefinition
 import de.hoennig.gittally.git.GitService
 import org.springframework.http.HttpStatus
 import org.springframework.http.ResponseEntity
@@ -103,13 +104,12 @@ class BuildsApiController(
             latest?.commit
                 ?: gitService.originHeadCommit(branch, workingDir)
                 ?: return notFound("branch '$branch' has no recorded build and no origin counterpart")
-        // a restarted build repeats what it originally ran: same branch, name, and command
+        // a restarted build re-runs its recorded build definition (settings from the current config)
         val running =
             buildExecutor.startBuild(
                 branch = latest?.branch ?: branch,
                 commit = commit,
-                buildCommandOverride = latest?.buildCommandOverride,
-                name = latest?.name ?: branch,
+                build = latest?.build ?: BuildDefinition.DEFAULT,
             )
         return ResponseEntity.accepted().body(
             BuildResultDto(