feat(v1): harden typed runtime boundaries
Elect one canonical EffectBatch codec, remove the parallel postcard API, and strengthen fail-closed host, form, sync, WASM, macro, generated-contract, and test-harness proofs with mutation-driven coverage.
req: wire/008
req: wire/009
req: wire/010
req: push/008
req: client_local/015
req: client_local/016
req: client_local/017
req: client_local/018
req: client_local/019
req: sync/024
req: sync/025
req: sync/026
req: sync/027
req: sync/028
req: sync/029
req: test/020
req: test/021
slhx agent
e9ced4e0c1