Plan 0.3.15: the 0.3.16 node tree's commits and the testing-integration breakage row

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/plans/release-0.3.15.md

@@ -115,6 +115,7 @@ Lesson for every node cut: the compat gate needs the receive side as well as the
 - The prover thread drops its cached tool paths when a stale binary is named (0.3.16).
 - The relaunch helper fixed with a watcher, or `restart --what app` stays retired.
 - Env-only defaults for the eight scripts that name the shared checkout by absolute path.
+- 0.3.16 node tree (ca3-v4-0316): 8e2f5cbe (the unwrap class), 0760b844 (the seven-window signalling rule, gate PASSED four cases), b2e21447 (finality cause fields), eec34ac3 (igneum_getRecentBlocks), 325f8b98 (difficulty rule v3 behind difficulty_v3_activation_daa at u64::MAX, digest unchanged until set). Pre-existing breakage to fix in that cut: `cargo check -p kaspa-testing-integration --tests` fails on the fork (the Header initialiser lacks vote_key_hash; the KaspadPayloadOps match is non-exhaustive on the finality ops), broken since the finality fields landed; the box suite then compiles EVERY test crate (`cargo test --no-run --workspace` or the crate list widened) so a test crate cannot rot silently again.
 - 0.3.16 node tree, proving agent: exec-sync-0313 da2d17ec (on 2e5d3d30) = consensus proof verification in-process (sp1-sdk 6.8.1 linked, 169 crates; three override fields in the digest once set: proving_consensus_verify_daa, proving_shard_program_id 0x2b1a81cb..., proving_aggregator_id 0x474678f3...; p2p payload 78 IgneumRequestProofRecords; a node with other embedded keys exits 3 at start); never by default, a digest move when switched, miners first. App side exec-app-0314 c00e608 (the proving-dir cap, forged.mjs harness 8/8, ledger P21 round 4 and its export-disk row labelled X31, which the site lane already used on master (X31 the testnet date, X32, X33): renumber the proving row X34 at the merge and rerun the ledger-text check). The fork's proof fixture is untracked at igneum/exec/testdata/ (the test skips without it): a build row.
 - Wallet 0.1.5 (Igneum-Wallet-0.1.5.dmg bf37a4ec, node 7961c5f1, wallet-ui-3 ab8dfdc): the gate and the publish straight after "0.3.15 live" (the wallet in the wild bundles a 5 October igneumd at protocol 12, the hub's 172 "level is 0" rejects); not held.
 - A standalone igneum-miner does not recover its template subscription after a node restart (fleet, 20:24Z): ledger row, fix = resubscribe on reconnect (0.3.16, the miner's owner); the fleet's restart script restarts the miner with the node until then.