xenia-analysis: unify disasm via xenia-cpu, split ingest/analyze, add sinks

The old src/ppc.rs that re-implemented PPC formatting collapses into
a 30-line shim that delegates to xenia-cpu's single-source-of-truth
disasm. A new disasm.rs wraps the shared iterator and feeds enriched
items (analysis context: function membership, xrefs, mnemonics) into
pluggable sinks.

Sinks split: text.rs (objdump-like output), json.rs (JSONL stream
matching the new xenia dis --json mode), duckdb.rs (the analysis DB
ingest). db.rs is restructured into ingest_instructions +
write_analysis_results so a run can stop after raw ingest, and a new
target_hex column lands on the instructions table. sql_views.rs adds
five additive views layered on top of the raw tables.

Tests: assert-based JSON-fixture goldens (disasm_goldens) and a
PRAGMA-table_info schema golden (db_schema_golden) covering all
ingested tables and the SQL views.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/xenia-analysis/Cargo.toml

@@ -7,7 +7,10 @@ build = "build.rs"
 
 [dependencies]
 xenia-xex = { workspace = true }
+xenia-cpu = { workspace = true }
 serde = { workspace = true }
+serde_json = { workspace = true }
 anyhow = { workspace = true }
 tracing = { workspace = true }
-rusqlite = { workspace = true }
+metrics = { workspace = true }
+duckdb = { workspace = true }