feat(memory): FPLAN-0276 — unify memory limits into config single-source + cleanup

- memory.config.json is the single source of truth: char caps (entry_limits, global) + rollover counts (per_branch, materialized from registry); .trinity files stripped to a one-line _usage header
- changed_entries gate now matches by content identity, not array position — prepending a new entry never re-flags unchanged legacy entries (old=old, new=new; no trimming required on a cap change)
- rollover push command + top-level 'drone @memory push' alias; corrected config _note + --help (rollover push surfaced, labeled destructive system-wide reset)
- removed 3 dead functions: seed_per_branch, its orphaned write_config, add_learning + its tests
- spawn birthright/builder + LOCAL/OBSERVATIONS templates aligned to the stripped shape
- 966 tests, seedgo 100%

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/aipass/memory/apps/memory.py

@@ -115,6 +115,7 @@ def print_help():
     table.add_row("rollover status", "Show rollover statistics")
     table.add_row("rollover check", "Dry run — check what needs rollover")
     table.add_row("rollover sync-lines", "Update line count metadata")
+    table.add_row("rollover push", "⚠ Reset ALL per_branch limits to defaults (system-wide)")
     table.add_row("search <query>", "Semantic search across all branch memories")
     table.add_row("symbolic <subcommand>", "Symbolic/fragmented memory extraction and search")
     table.add_row("templates <subcommand>", "Living template push, diff, and status")
@@ -168,7 +169,7 @@ def print_help():
     console.print()
 
     console.print(
-        "Commands: search, rollover [run|status|check|sync-lines], lint,"
+        "Commands: search, rollover [run|status|check|sync-lines|push], lint,"
         " pool [process|status], symbolic, templates, verify, watch"
     )
     console.print()
@@ -234,6 +235,9 @@ def route_command(command: str, args: List[str], modules: List[Any]) -> bool:
         start_watch()
         return True
 
+    if command == "push":
+        return route_command("rollover", ["push"], modules)
+
     for module in modules:
         try:
             if module.handle_command(command, args):