test(connector-id): migrate fixtures and assertions to pi-mono ids

Replaces legacy adapter ids (codex_local / claude_local / gemini_local /
claude_compatible) across ~42 test files with pi-mono equivalents:
- codex_local → openai-codex
- claude_local → claude-pro
- gemini_local → gemini-cli
- claude_compatible → anthropic

Hand-rewrites where fixture semantics changed:
- connector-matching: TASK_TYPE_PREFERENCE ordering rebased (claude-pro
  first for code/content/management; google first for research)
- connector-model-policy: getModels(provider) from pi-ai instead of the
  deleted adapter.module.models array
- session-management + edge-case-session: adapter exemption removed;
  rotation now uniform under pi-mono
- ipc-core-admin-handlers: CSV compat model replaced with pi-ai anthropic
- connectors.spec: lookup by openai-codex id (catalog now starts with claude-pro)
- onboarding-model-pool: listProviderModels(provider) helper; label text
  changed to "ChatGPT Plus/Pro (Codex)"
- database integration: added vault insecure-fallback env + electron mock
- command-paths: uses new @main/connector-helpers normalizeCommandValue
- pi-mono-migrations: added `as string` casts for 3 negative-existence
  assertions verifying legacy ids were removed

Drops:
- pnpm-workspace.yaml packages: [] (was "packages/*"; directory empty)
- obsolete CONNECTOR_STRENGTHS import; .module.models probing

Verification:
- pnpm typecheck → 0 errors
- pnpm lint → 0 errors / 0 warnings
- pnpm build:verify → 0 errors / 0 warnings
- pnpm test:unit → 508/508 pass
- pnpm test:integration → 96/96 pass
- All 6 adapter hard gates pass (NOT FOUND / 0 matches / empty)
- pi-ai / pi-agent-core / pi-coding-agent all resolved @0.67.6

src/main/agent-runtime/sqlite-session-store.ts

@@ -0,0 +1,65 @@
+import type { AgentMessage } from "@mariozechner/pi-agent-core";
+import type { AppDatabase } from "@main/database";
+
+/**
+ * SQLite-backed pi `AgentMessage[]` store.
+ *
+ * One store instance per task_session. Owners must call `appendMessage`
+ * exactly once per pi `message_end` event, and `replaceMessages` after pi
+ * `compact` returns a compacted message list.
+ */
+export class SqliteSessionStore {
+  constructor(
+    private readonly db: AppDatabase,
+    public readonly taskSessionId: string,
+  ) {}
+
+  loadMessages(): AgentMessage[] {
+    const rows = this.db.sessionEntries.listActive(this.taskSessionId);
+    const result: AgentMessage[] = [];
+    for (const row of rows) {
+      if (row.kind === "message") {
+        try {
+          result.push(JSON.parse(row.payloadJson) as AgentMessage);
+        } catch {
+          // Skip malformed entries (defensive) — preserves the rest of the
+          // transcript instead of failing the entire load.
+        }
+      }
+    }
+    return result;
+  }
+
+  appendMessage(message: AgentMessage): void {
+    this.db.sessionEntries.append({
+      taskSessionId: this.taskSessionId,
+      kind: "message",
+      role: (message as { role?: string }).role ?? null,
+      payloadJson: JSON.stringify(message),
+    });
+  }
+
+  appendCompaction(summary: string): void {
+    this.db.sessionEntries.append({
+      taskSessionId: this.taskSessionId,
+      kind: "compaction",
+      role: null,
+      payloadJson: JSON.stringify({ summary }),
+    });
+  }
+
+  replaceMessages(messages: AgentMessage[], compactionSummary?: string): void {
+    const entries: Array<{ kind: "message" | "compaction"; role: string | null; payloadJson: string }> = [];
+    if (compactionSummary) {
+      entries.push({ kind: "compaction", role: null, payloadJson: JSON.stringify({ summary: compactionSummary }) });
+    }
+    for (const message of messages) {
+      entries.push({
+        kind: "message",
+        role: (message as { role?: string }).role ?? null,
+        payloadJson: JSON.stringify(message),
+      });
+    }
+    this.db.sessionEntries.replace({ taskSessionId: this.taskSessionId, entries });
+  }
+}