- Add kernel init bundle helper + verify:init-bundle; tighten release-checklist gates

- Implement cooperative F_GETLK/F_SETLK/F_SETLKW; optional BARE_OS_POSIX_SOCKET_FD_BRIDGE
- Add ctx.bareOsGetconfSysconf; extend getconf for _SC_*; awk delete stmt; POSIX heredoc cap
- disk.os: replication_snapshot + replication_operator_sketch; blind-relay swarm schema 2
- Protomux operatorMetrics.backpressureEmitCount; warm-cache invalidate on boot/init puts
- Bump POSIX profile 1.0.6 and syscalls.json schema 6; sync schemas, handbook, env appendix
- Tests + seeder/kernel parity (rsync after coreutils/bare-libs builds)

kernel/bin/awk

@@ -90,7 +90,7 @@ function bareOsEmitRaw(ctx, chunk) {
 /**
  * POSIX-oriented awk interpreter for Bare OS (no import; concatenated before src/awk.js).
  * Supports: BEGIN/END, /re/, line patterns, {}, print/printf, if/else, while, for(;;), for(x in a),
- * next, exit, break, continue, ++/--, arrays, strings, regex ~ !~, builtins (length, substr, index,
+ * delete arr[idx], next, exit, break, continue, ++/--, arrays, strings, regex ~ !~, builtins (length, substr, index,
  * split, sprintf, sub, gsub, match, int, tolower, toupper, rand, srand), getline from stdin/files,
  * optional fixed-width fields via FIELDWIDTHS when BARE_OS_AWK_FIELDWIDTHS is enabled,
  * -F FS, NF, NR, FNR, $0..$n, OFS, ORS, RS, ARGC, ARGV, FILENAME, ENVIRON (read-only mirror).
@@ -246,7 +246,8 @@ function bareAwkLex(src, st) {
       id === 'printf' ||
       id === 'return' ||
       id === 'function' ||
-      id === 'getline'
+      id === 'getline' ||
+      id === 'delete'
     ) {
       return { kind: 'KW', value: id, line }
     }
@@ -462,6 +463,15 @@ class BareAwkParser {
       this.optSemi()
       return { t: t.value }
     }
+    if (t.kind === 'KW' && t.value === 'delete') {
+      this.p++
+      const arrTok = this.eat('ID')
+      this.eat('OP', '[')
+      const key = this.parseExpr()
+      this.eat('OP', ']')
+      this.optSemi()
+      return { t: 'delete', arr: arrTok.value, key }
+    }
     if (t.kind === 'KW' && t.value === 'exit') {
       this.p++
       let code = null
@@ -1278,6 +1288,13 @@ class BareAwkRuntime {
         }
         break
       }
+      case 'delete': {
+        const tbl =
+          this.arrays[st.arr] || (this.arrays[st.arr] = Object.create(null))
+        const ky = String(this.evalExpr(st.key))
+        delete tbl[ky]
+        break
+      }
       case 'next':
         return { t: 'next' }
       case 'break':